首页 › 趣味英语 › 煎蛋小学堂:英语百科(视频+中英字幕) 第3课:小行星要撞地球会发生什么?

meili 发表于 2022-10-18 20:25:59

煎蛋小学堂:英语百科(视频+中英字幕) 第3课:小行星要撞地球会发生什么?

<p><span word="Weve">Weve</span> <span word="all">all</span> <span word="witnessed">witnessed</span> <span word="the">the</span> <span word="beauty">beauty</span> <span word="of">of</span> <span word="a">a</span> <span word="shooting">shooting</span> <span word="star">star</span>,<span word="but">but</span> <span word="what">what</span> <span word="would">would</span> <span word="happen">happen</span> <span word="if">if</span> <span word="an">an</span> <span word="asteroid">asteroid</span> <span word="was">was</span> <span word="on">on</span> <span word="a">a</span> <span word="collision">collision</span> <span word="course">course</span> <span word="for">for</span> <span word="earth">earth</span>?我们都曾目睹过流星雨的美景，但如果小行星要撞地球会发生什么?<span word="Could">Could</span> <span word="we">we</span> <span word="detect">detect</span> <span word="it">it</span> <span word="ahead">ahead</span> <span word="of">of</span> <span word="time">time</span>?我们能提前察觉到它吗?<span word="And">And</span> <span word="more">more</span> <span word="importantly">importantly</span> <span word="could">could</span> <span word="we">we</span> <span word="stop">stop</span> <span word="it">it</span>?更重要的是 我们能阻止它吗?</p>我相信我有个答案<span word="Now">Now</span> <span word="you">you</span> <span word="see">see</span>,<span word="asteroid">asteroid</span> <span word="impacts">impacts</span> <span word="are">are</span> <span word="serious">serious</span> <span word="business">business</span>,<span word="When">When</span> <span word="I">I</span> <span word="was">was</span> <span word="in">in</span> <span word="second">second</span> <span word="grade">grade</span> <span word="Ms">Ms</span>.<span word="McGonigal">McGonigal</span> <span word="told">told</span> <span word="us">us</span> <span word="that">that</span> <span word="the">the</span> <span word="dinosaurs">dinosaurs</span> <span word="the">the</span> <span word="ancient">ancient</span> <span word="dinosaurs">dinosaurs</span> <span word="died">died</span> <span word="out">out</span> <span word="because">because</span> <span word="they">they</span> <span word="had">had</span> <span word="small">small</span> <span word="brains">brains</span> <span word="may">may</span> <span word="be">be</span> <span word="like">like</span> <span word="my">my</span> <span word="old">old</span> <span word="boss">boss</span>.你也知道 行星撞地球可不是件小事,当我上二年级时 <span word="McGonigal">McGonigal</span>女士告诉我们说,恐龙 古代的恐龙之所以灭绝,是因为他们的大脑太小，就像我的老上司一样。<span word="But">But</span> <span word="even">even</span> <span word="she">she</span> <span word="knew">knew</span> <span word="that">that</span> <span word="was">was</span> <span word="kinda">kinda</span> <span word="lame">lame</span> ,<span word="that">that</span> <span word="theory">theory</span> <span word="was">was</span> <span word="nothing">nothing</span>. <span word="It">It</span> <span word="turns">turns</span> <span word="out">out</span> <span word="in">in</span> <span word="my">my</span> <span word="lifetime">lifetime</span> <span word="pelple">pelple</span> <span word="found">found</span> <span word="this">this</span> <span word="crater">crater</span>,<span word="off">off</span> <span word="Chicxulub">Chicxulub</span>,<span word="Mexico">Mexico</span>，<span word="This">This</span> <span word="crater">crater</span> <span word="was">was</span> <span word="so">so</span> <span word="big">big</span>. <span word="How">How</span> <span word="big">big</span> <span word="was">was</span> <span word="it">it</span>? <span word="It">It</span> <span word="was">was</span> <span word="so">so</span> <span word="big">big</span> <span word="that">that</span> <span word="an">an</span> <span word="asteroid">asteroid</span> <span word="hit">hit</span> <span word="the">the</span> <span word="earth">earth</span> (<span word="or">or</span> <span word="impactors">impactors</span> <span word="hit">hit</span> <span word="the">the</span> <span word="earth">earth</span>),<span word="Threw">Threw</span> <span word="so">so</span> <span word="much">much</span> <span word="stuff">stuff</span> <span word="into">into</span> <span word="the">the</span> <span word="Earths">Earths</span> <span word="sky">sky</span> <span word="it">it</span> <span word="was">was</span> <span word="bigger">bigger</span> <span word="in">in</span> <span word="diamete">diamete</span> <span word="than">than</span> <span word="the">the</span> <span word="earth">earth</span> <span word="itself">itself</span> <span word="so">so</span> <span word="the">the</span> <span word="earth">earth</span> <span word="was">was</span> <span word="surrounded">surrounded</span> <span word="by">by</span> <span word="red">red</span> <span word="hot">hot</span> <span word="rock">rock</span> <span word="weeks">weeks</span> <span word="at">at</span> <span word="a">a</span> <span word="time">time</span>.但也也知道这说法站不住脚，这个理论什么也不是,结果在我在世时，人们在墨西哥希克苏鲁发现了这个陨石坑。陨石坑特别大，有多大呢？它是如此地大，当小行星击中地球（或物体击中地球）.它将极多东西抛向地球空中，形成碎石圈直径比地球更大，因面地球在数周内都将被炽热的红色岩石包围着。<span word="It">It</span> <span word="cooked">cooked</span> <span word="everything">everything</span> .<span word="And">And</span> <span word="just">just</span> <span word="the">the</span> <span word="animals">animals</span> <span word="that">that</span> <span word="lived">lived</span> <span word="in">in</span> <span word="burrows">burrows</span> <span word="and">and</span> <span word="caves">caves</span>. <span word="our">our</span> <span word="ancestors">ancestors</span> <span word="lead">lead</span> <span word="to">to</span> <span word="us">us</span> <span word="so">so</span> <span word="serious">serious</span> <span word="business">business</span> <span word="you">you</span> <span word="may">may</span> <span word="recall">recall</span> <span word="Valentines">Valentines</span> <span word="Day">Day</span> 2013?它烤熟了一切，除了那些住在洞穴和山洞里的动物,比如说我们的祖先，还记得2013年情人节那件事吗？<span word="Chelyabinsk">Chelyabinsk</span> <span word="Russia">Russia</span> (<span word="boorn">boorn</span>) <span word="air">air</span> <span word="burst">burst</span>. <span word="See">See</span> <span word="it">it</span> <span word="you">you</span> <span word="are">are</span> <span word="an">an</span> <span word="asteroid">asteroid</span> ,<span word="and">and</span> <span word="you">you</span> <span word="are">are</span> <span word="going">going</span> 10 <span word="km">km</span>/<span word="s">s</span> <span word="or">or</span> 20 <span word="km">km</span>/<span word="s">s</span>. <span word="And">And</span> <span word="you">you</span> <span word="hit">hit</span> <span word="the">the</span> <span word="Earths">Earths</span> <span word="atmosphere">atmosphere</span>,<span word="the">the</span> <span word="atmosphere">atmosphere</span> <span word="is">is</span> <span word="like">like</span> <span word="concrete">concrete</span>. <span word="you">you</span> <span word="cant">cant</span> <span word="get">get</span> <span word="out">out</span> <span word="of">of</span> <span word="the">the</span> <span word="way">way</span> <span word="so">so</span> <span word="the">the</span> <span word="asteroid">asteroid</span> <span word="just">just</span> <span word="explodes">explodes</span> <span word="in">in</span> <span word="air">air</span> <span word="burst">burst</span>.<span word="So">So</span> <span word="these">these</span> <span word="asteroids">asteroids</span> <span word="are">are</span> <span word="serious">serious</span> ,<span word="most">most</span> <span word="of">of</span> <span word="them">them</span> <span word="are">are</span> <span word="evey">evey</span> <span word="small">small</span>.俄罗斯车里雅宾斯克上空的爆炸,看到了吗，如果你是个小行星 以10<span word="km">km</span>/<span word="s">s</span> 或20<span word="km">km</span>/<span word="s">s</span> 的速度前进，你碰上地球的大气，大气就像水泥一样，你躲不过去，所以小行星只能在半空中爆炸.因此这些小行星得严肃对待，它们绝大多数都很小.<span word="If">If</span> <span word="youre">youre</span> <span word="under">under</span> 10 <span word="meters">meters</span> <span word="in">in</span> <span word="diameter">diameter</span> <span word="you">you</span> <span word="hit">hit</span> <span word="the">the</span> <span word="Earths">Earths</span> <span word="atmosphere">atmosphere</span>.<span word="you">you</span> <span word="burn">burn</span> <span word="up">up</span> <span word="all">all</span> <span word="Big">Big</span> <span word="Blue">Blue</span> <span word="streak">streak</span>,<span word="green">green</span> <span word="street">street</span> <span word="white">white</span> <span word="streak">streak</span> <span word="and">and</span> <span word="then">then</span> <span word="humans">humans</span> <span word="make">make</span> <span word="wishes">wishes</span> <span word="upon">upon</span> <span word="you">you</span> （<span word="I">I</span> <span word="dont">dont</span> <span word="know">know</span> <span word="how">how</span> <span word="efficacious">efficacious</span> <span word="these">these</span> <span word="wishes">wishes</span> <span word="are">are</span> <span word="but">but</span> <span word="people">people</span> <span word="do">do</span> <span word="that">that</span>）.如果你的直径小于10米，在击中地球大气层后，你就会烧毁，形成蓝色大条纹、绿色条纹和白色条纹之后蓝星人会对着你许愿，我不知道这么许愿有没有用，但是人们就这么干.<span word="Alright">Alright</span>,<span word="so">so</span>,<span word="if">if</span> <span word="their">their</span> <span word="asteroid">asteroid</span> <span word="starts">starts</span> <span word="to">to</span> <span word="get">get</span> <span word="bigger">bigger</span>,<span word="Starts">Starts</span> <span word="to">to</span> <span word="get">get</span> <span word="into">into</span> <span word="the">the</span> 25 <span word="meters">meters</span> <span word="and">and</span> <span word="the">the</span> 45 <span word="meters">meters</span> <span word="in">in</span> <span word="diameter">diameter</span>.<span word="then">then</span> <span word="you">you</span> <span word="get">get</span> <span word="Meteor">Meteor</span> <span word="Crater">Crater</span> <span word="Arizona">Arizona</span> (<span word="wham">wham</span>)<span word="huge">huge</span> <span word="thing">thing</span>.<span word="That">That</span> <span word="would">would</span> <span word="be">be</span> <span word="like">like</span> <span word="a">a</span> <span word="city">city</span> <span word="killer">killer</span>,<span word="or">or</span> <span word="a">a</span> <span word="county">county</span> <span word="killer">killer</span>.<span word="And">And</span> <span word="then">then</span> <span word="when">when</span> <span word="they">they</span> <span word="get">get</span> <span word="to">to</span> <span word="be">be</span> <span word="a">a</span> 100 <span word="meters">meters</span> /140 <span word="meters">meters</span> <span word="now">now</span> <span word="youre">youre</span> <span word="into">into</span> <span word="a">a</span> <span word="country">country</span> <span word="killer">killer</span>.<span word="and">and</span> <span word="then">then</span> <span word="they">they</span> <span word="get">get</span> <span word="bigger">bigger</span> <span word="than">than</span> <span word="that">that</span> <span word="and">and</span> <span word="its">its</span> <span word="a">a</span> <span word="continent">continent</span> <span word="killer">killer</span>.<span word="much">much</span> <span word="bigger">bigger</span> <span word="than">than</span> <span word="that">that</span> <span word="and">and</span> <span word="youre">youre</span> <span word="taking">taking</span> <span word="out">out</span> <span word="whole">whole</span> <span word="races">races</span> <span word="of">of</span> <span word="ancient">ancient</span> <span word="species">species</span>.好的 那么如果行星再大一点呢，直径开始变成25米到45米的了,那么结果就是巴林杰陨石坑那样的大家伙，这就像是一个屠城者或者一个毁郡者之后，当直径到达100/140米之后，你就会变成一个灭国者,当直径继续增大，你就成了洲际杀手，比前面的大多了，所有古代物种都会因你而断子绝孙。<span word="So">So</span>,<span word="what">what</span> <span word="if">if</span> <span word="we">we</span> <span word="found">found</span> <span word="an">an</span> <span word="asteroid">asteroid</span> <span word="that">that</span> <span word="was">was</span> <span word="headed">headed</span> <span word="our">our</span> <span word="way">way</span>,<span word="how">how</span> <span word="would">would</span> <span word="we">we</span> <span word="find">find</span> <span word="it">it</span>? <span word="How">How</span> <span word="would">would</span> <span word="we">we</span> <span word="find">find</span> <span word="an">an</span> <span word="asteroid">asteroid</span> <span word="headed">headed</span> <span word="our">our</span> <span word="way">way</span>?那么，如果我们发现冲向地球的行星呢，我们要怎么发现它？ 我们该怎么发现撞向我们的行星呢？<span word="Thats">Thats</span> <span word="a">a</span> <span word="good">good</span> <span word="question">question</span>,<span word="well">well</span>,<span word="you">you</span> <span word="can">can</span> <span word="use">use</span> <span word="telescopes">telescopes</span>.<span word="Skilled">Skilled</span> <span word="people">people</span> <span word="can">can</span> <span word="point">point</span> <span word="the">the</span> <span word="cameras">cameras</span> <span word="at">at</span> <span word="the">the</span> <span word="sky">sky</span> <span word="and">and</span> <span word="look">look</span> <span word="for">for</span> <span word="fast">fast</span>-<span word="moving">moving</span> <span word="objects">objects</span>.<span word="Objects">Objects</span> <span word="that">that</span> <span word="are">are</span> <span word="crossing">crossing</span> <span word="the">the</span> <span word="Earths">Earths</span> <span word="orbit">orbit</span>,<span word="but">but</span> <span word="were">were</span> <span word="missing">missing</span> <span word="perhaps">perhaps</span> <span word="a">a</span> <span word="hundred">hundred</span> <span word="thousand">thousand</span> <span word="of">of</span> <span word="these">these</span> <span word="things">things</span> ,<span word="of">of</span> <span word="these">these</span> <span word="country">country</span> <span word="killers">killers</span>,<span word="city">city</span> <span word="killers">killers</span> <span word="and">and</span> <span word="country">country</span> <span word="killers">killers</span>.问的好，那么你可以用望远镜.有经验的人可以将相机对着天空，寻找快速移动的物体.那些穿过地球轨道的物体，但是我们可能会错过成百上千的行星，这些屠城者，毁郡者和灭国者们。<span word="So">So</span>,<span word="what">what</span> <span word="we">we</span> <span word="want">want</span> <span word="to">to</span> <span word="do">do</span> <span word="is">is</span> <span word="build">build</span> <span word="a">a</span> <span word="spaceraft">spaceraft</span> <span word="called">called</span> <span word="The">The</span> <span word="Sentinel">Sentinel</span>.<span word="and">and</span> <span word="as">as</span> <span word="we">we</span> <span word="say">say</span> <span word="its">its</span> <span word="like">like</span> <span word="looking">looking</span> <span word="for">for</span> <span word="a">a</span> <span word="charcoal">charcoal</span> <span word="briquette">briquette</span> <span word="in">in</span> <span word="the">the</span> <span word="dark">dark</span>.<span word="these">these</span> <span word="things">things</span> <span word="are">are</span> <span word="hard">hard</span> <span word="to">to</span> <span word="find">find</span>.<span word="They">They</span> <span word="are">are</span> <span word="tiny">tiny</span> <span word="compared">compared</span> <span word="to">to</span> <span word="the">the</span> <span word="vastness">vastness</span> <span word="of">of</span> <span word="space">space</span>.那么我们想做的是造一架飞船 取名为“哨兵”,正如我们所说“这就像在黑暗里找炭团”，行星很难被发现，和宇宙之广大相比，它们太渺小了。<span word="But">But</span> <span word="infrared">infrared</span> <span word="light">light</span>/<span word="heat">heat</span> <span word="bounces">bounces</span> <span word="off">off</span> <span word="them">them</span> <span word="so">so</span> <span word="what">what</span> <span word="you">you</span> <span word="will">will</span> <span word="do">do</span>? <span word="You">You</span> <span word="are">are</span> <span word="a">a</span> <span word="satellite">satellite</span>,<span word="you">you</span> <span word="are">are</span> <span word="a">a</span> <span word="surveying">surveying</span> <span word="spacecraft">spacecraft</span>,<span word="you">you</span> <span word="get">get</span> <span word="your">your</span> <span word="back">back</span> <span word="to">to</span> <span word="the">the</span> <span word="Sun">Sun</span> <span word="and">and</span> <span word="look">look</span> <span word="out">out</span> <span word="from">from</span> <span word="about">about</span> <span word="the">the</span> <span word="orbit">orbit</span> <span word="of">of</span> <span word="Venus">Venus</span>.<span word="Any">Any</span> <span word="try">try</span> <span word="to">to</span> <span word="find">find</span> <span word="all">all</span> <span word="these">these</span> <span word="asteroids">asteroids</span>,<span word="And">And</span> <span word="then">then</span> <span word="you">you</span> <span word="find">find</span> <span word="one">one</span>,<span word="what">what</span> <span word="do">do</span> <span word="you">you</span> <span word="do">do</span>?<span word="Do">Do</span> <span word="you">you</span> <span word="run">run</span> <span word="in">in</span> <span word="circies">circies</span> <span word="screaming">screaming</span>,<span word="AHNo">AHNo</span>,<span word="No">No</span>,<span word="No">No</span>,<span word="weve">weve</span> <span word="got">got</span> <span word="to">to</span> <span word="deflect">deflect</span> <span word="it">it</span> ,<span word="just">just</span> <span word="a">a</span> <span word="little">little</span> <span word="just">just</span> <span word="a">a</span> <span word="tiny">tiny</span> <span word="amount">amount</span>.但它们会放射出红外线辐射，所以你要怎么做？你是一个卫星，是个调查用的航天器，你跑到太阳后面在金星轨道附近四处张望，试图找到所有的这些行星，你找到了一个 肿么办 画着圈圈四处尖叫，不不不 我们得让它走偏一点 一点就行 只要一点点。<span word="Asteroid">Asteroid</span> <span word="might">might</span> <span word="be">be</span> <span word="going">going</span> 10<span word="km">km</span>/<span word="s">s</span>,<span word="we">we</span> <span word="want">want</span> <span word="to">to</span> <span word="change">change</span> <span word="its">its</span> <span word="speed">speed</span> <span word="about">about</span> 2 <span word="mm">mm</span>/<span word="s">s</span>.<span word="So">So</span> <span word="ten">ten</span> <span word="kilometers">kilometers</span>,<span word="thats">thats</span> <span word="ten">ten</span> <span word="times">times</span> <span word="a">a</span> <span word="thousand">thousand</span> <span word="meters">meters</span>,<span word="thats">thats</span> 10,000 <span word="meters">meters</span>. <span word="A">A</span> <span word="millimeter">millimeter</span> <span word="thats">thats</span> <span word="a">a</span> <span word="thousandth">thousandth</span> <span word="of">of</span> <span word="a">a</span> <span word="meter">meter</span> <span word="so">so</span> <span word="that">that</span> <span word="you">you</span> <span word="take">take</span> <span word="the">the</span> <span word="one">one</span> <span word="over">over</span> <span word="the">the</span> <span word="thousand">thousand</span> <span word="its">its</span> <span word="a">a</span> <span word="thousand">thousand</span> <span word="times">times</span> <span word="ten">ten</span> <span word="thousand">thousand</span>,<span word="thats">thats</span> 10 <span word="million">million</span>,<span word="You">You</span> <span word="want">want</span> <span word="to">to</span> <span word="change">change</span> <span word="its">its</span> <span word="speed">speed</span> <span word="a">a</span> 10 <span word="millionth">millionth</span> <span word="of">of</span> <span word="its">its</span> <span word="total">total</span>.行星可能以10<span word="km">km</span>/<span word="s">s</span> 的速度运行，我们要让它的速度改变2<span word="mm">mm</span>/<span word="s">s</span>, 10千米就是10*1000米，也就是10,000米。一毫米是千分之一米，那么你在取出这一千分之一，所占比例就是1000*10,000 也就是一百万,你想改变总速度的一百万分之一.<span word="Thats">Thats</span> <span word="not">not</span> <span word="very">very</span> <span word="much">much</span>,<span word="but">but</span> <span word="if">if</span> <span word="youre">youre</span> <span word="an">an</span> <span word="asteroid">asteroid</span> <span word="that">that</span> <span word="comes">comes</span> <span word="in">in</span> <span word="at">at</span> 10,000 <span word="tons">tons</span>/100,000<span word="tonnes">tonnes</span>.<span word="it">it</span> <span word="does">does</span> <span word="take">take</span> <span word="quite">quite</span> <span word="a">a</span> <span word="bit">bit</span> <span word="force">force</span> <span word="to">to</span> <span word="change">change</span> <span word="it">it</span> <span word="a">a</span> 10 <span word="millionth">millionth</span> <span word="of">of</span> <span word="its">its</span> <span word="speed">speed</span>.<span word="Okay">Okay</span>,<span word="how">how</span> <span word="do">do</span> <span word="we">we</span> <span word="do">do</span> <span word="that">that</span>?<span word="Well">Well</span>,<span word="the">the</span> <span word="easiest">easiest</span> <span word="way">way</span> <span word="is">is</span> <span word="to">to</span> <span word="get">get</span> <span word="a">a</span> <span word="rocket">rocket</span> ,<span word="just">just</span> <span word="a">a</span> <span word="big">big</span> <span word="rocket">rocket</span>.<span word="just">just</span> <span word="go">go</span> <span word="out">out</span> <span word="there">there</span> <span word="and">and</span> <span word="smack">smack</span> <span word="into">into</span> <span word="it">it</span>.<span word="Except">Except</span> <span word="as">as</span> <span word="an">an</span> <span word="outer">outer</span> <span word="space">space</span> <span word="so">so</span> <span word="it">it</span> ,<span word="just">just</span> <span word="goes">goes</span> (<span word="silence">silence</span>)<span word="like">like</span> <span word="that">that</span>.似乎不多 但如果你是那个撞向地球的万吨/十万吨的小行星。想要让速度改变一百万分之一的确需要很大的力。好的，那么怎么办？最简单的方法是弄一个火箭 要大大的一个。 飞到那里一头装进去，只不过这是在外太空 所以效果是这样的（静音）。<span word="Okay">Okay</span>,<span word="that">that</span> <span word="would">would</span> <span word="change">change</span> <span word="its">its</span> <span word="speed">speed</span> <span word="a">a</span> <span word="little">little</span>,<span word="now">now</span> <span word="notice">notice</span> <span word="everybody">everybody</span>,<span word="what">what</span> <span word="if">if</span> <span word="its">its</span> <span word="not">not</span> <span word="just">just</span> <span word="a">a</span> <span word="rock">rock</span>?<span word="What">What</span> <span word="if">if</span> <span word="its">its</span> <span word="a">a</span> <span word="pile">pile</span> <span word="of">of</span> <span word="rocks">rocks</span> <span word="just">just</span> <span word="loosely">loosely</span> <span word="held">held</span> <span word="together">together</span> <span word="by">by</span> <span word="primordial">primordial</span> <span word="gravity">gravity</span>? <span word="And">And</span> <span word="so">so</span> <span word="if">if</span> <span word="you">you</span> <span word="hit">hit</span> <span word="them">them</span> <span word="they">they</span> <span word="will">will</span> <span word="just">just</span> <span word="spread">spread</span> <span word="out">out</span> <span word="and">and</span> <span word="you">you</span> <span word="will">will</span> <span word="have">have</span> <span word="a">a</span> <span word="shower">shower</span> <span word="of">of</span> <span word="rocks">rocks</span>,<span word="That">That</span> <span word="would">would</span> <span word="be">be</span> <span word="bad">bad</span> <span word="So">So</span>,<span word="how">how</span> <span word="about">about</span> <span word="this">this</span>？好的 这会将它的速度改变一点点 现在各位看官注意，如果撞的不是岩石呢？如果那只是被原初引力聚焦在一起的一堆松垮岩石呢？如果你击中它们 它们就会分散开来 给你下场石头雨。好悲催的样子 那么怎么办呢？<span word="We">We</span> <span word="will">will</span> <span word="get">get</span> <span word="a">a</span> <span word="big">big</span> <span word="space">space</span> <span word="craft">craft</span> <span word="that">that</span> <span word="is">is</span> <span word="massive">massive</span>,<span word="a">a</span> <span word="massive">massive</span> <span word="sapacecraft">sapacecraft</span> <span word="will">will</span> <span word="go">go</span> <span word="out">out</span> <span word="there">there</span> <span word="and">and</span> <span word="just">just</span> <span word="get">get</span> <span word="nearer">nearer</span> <span word="to">to</span> <span word="the">the</span> <span word="asteroid">asteroid</span>,<span word="Just">Just</span> <span word="get">get</span> <span word="near">near</span> <span word="it">it</span>,<span word="and">and</span> <span word="then">then</span> <span word="the">the</span> <span word="mutual">mutual</span> <span word="gravity">gravity</span> <span word="of">of</span> <span word="the">the</span> <span word="you">you</span> <span word="the">the</span> <span word="asteroid">asteroid</span> <span word="and">and</span> <span word="me">me</span> <span word="the">the</span> <span word="spacecraft">spacecraft</span> <span word="will">will</span> <span word="tug">tug</span> <span word="the">the</span> <span word="asteroids">asteroids</span> <span word="just">just</span> <span word="a">a</span> <span word="little">little</span> <span word="bit">bit</span>，<span word="just">just</span> <span word="a">a</span> <span word="tiny">tiny</span> <span word="amount">amount</span> <span word="or">or</span> <span word="maybe">maybe</span> <span word="get">get</span> <span word="on">on</span> <span word="the">the</span> <span word="other">other</span> <span word="side">side</span> <span word="and">and</span> <span word="tug">tug</span> <span word="this">this</span> <span word="way">way</span>.<span word="That">That</span> <span word="might">might</span> <span word="work">work</span> <span word="but">but</span> <span word="heres">heres</span> <span word="the">the</span> <span word="problem">problem</span>我们让一艘硕大的宇宙飞船飞过去 让它靠近行星，靠近它 之后你（小行星）的和我（宇宙飞船）的相互引力会将行星拉近一点点 就那么一点点 或者到这边来 这么拉,这也可能有用 不过现在有个问题。<span word="We">We</span> <span word="need">need</span> <span word="a">a</span> <span word="huge">huge</span> <span word="amount">amount</span> <span word="of">of</span> <span word="fuel">fuel</span> <span word="for">for</span> <span word="days">days</span> <span word="ans">ans</span> <span word="weeks">weeks</span> <span word="and">and</span> <span word="months">months</span> <span word="and">and</span> <span word="years">years</span>.<span word="And">And</span> <span word="what">what</span> <span word="if">if</span> <span word="it">it</span> <span word="stops">stops</span> <span word="working">working</span> <span word="you">you</span> <span word="cant">cant</span> <span word="go">go</span> <span word="out">out</span> <span word="there">there</span> <span word="and">and</span> <span word="fix">fix</span> <span word="it">it</span>.<span word="Okay">Okay</span>,<span word="how">how</span> <span word="about">about</span> <span word="this">this</span>?<span word="The">The</span> <span word="Laser">Laser</span> <span word="Bees">Bees</span>?<span word="A">A</span> <span word="swarm">swarm</span> <span word="of">of</span> <span word="sunlight">sunlight</span> <span word="powered">powered</span> <span word="lasers">lasers</span> <span word="that">that</span> <span word="are">are</span> <span word="zapping">zapping</span> <span word="the">the</span> <span word="surface">surface</span> <span word="of">of</span> <span word="the">the</span> <span word="asteroid">asteroid</span>,<span word="for">for</span> <span word="days">days</span>,<span word="and">and</span> <span word="weeks">weeks</span>,<span word="and">and</span> <span word="months">months</span>,<span word="and">and</span> <span word="years">years</span> <span word="ZAP">ZAP</span> <span word="ZAP">ZAP</span> <span word="ZAP">ZAP</span>.<span word="So">So</span> <span word="some">some</span> <span word="asteroids">asteroids</span>,<span word="some">some</span> <span word="rock">rock</span> <span word="is">is</span> <span word="vaporized">vaporized</span>.我们需要大量的燃料 得准备数天 数星期 数月甚至数年的，如果它停止工作了 你没法跑到那修理它，好 那这么办 激光小密蜂怎么样？一群太阳能激光器射向行星的表面，就这么嗞嗞嗞地照上几天 几周 几个月甚至几年。一部分行星 一部分岩石会蒸发。<span word="So">So</span> <span word="the">the</span> <span word="ejecta">ejecta</span>,<span word="or">or</span> <span word="the">the</span> <span word="stuff">stuff</span> <span word="ejected">ejected</span> <span word="has">has</span> <span word="momentum">momentum</span> <span word="just">just</span> <span word="like">like</span> <span word="rocket">rocket</span> <span word="fuel">fuel</span>,<span word="just">just</span> <span word="like">like</span> <span word="standing">standing</span> <span word="on">on</span> <span word="a">a</span> <span word="skateboard">skateboard</span> <span word="and">and</span> <span word="playing">playing</span> <span word="catch">catch</span> <span word="with">with</span> <span word="a">a</span> <span word="bowling">bowling</span> <span word="ball">ball</span>.<span word="the">the</span> <span word="way">way</span> <span word="you">you</span> <span word="do">do</span>.<span word="And">And</span> <span word="so">so</span> <span word="it">it</span> <span word="would">would</span> <span word="then">then</span> <span word="cause">cause</span> <span word="the">the</span> <span word="asteroid">asteroid</span> <span word="to">to</span> <span word="change">change</span> <span word="its">its</span> <span word="speed">speed</span>,从物体上抛出的东西和火箭燃料一样 都有动量，就像你站在滑板上用保龄球玩接球游戏一样，就像你做的那样，之后 这会致使小行星改变运行速度。<span word="And">And</span> <span word="so">so</span> <span word="you">you</span> <span word="send">send</span> <span word="a">a</span> <span word="swarm">swarm</span> <span word="of">of</span> <span word="these">these</span> <span word="laser">laser</span> <span word="spacecraft">spacecraft</span>,<span word="so">so</span> <span word="that">that</span> <span word="if">if</span> <span word="one">one</span> <span word="of">of</span> <span word="them">them</span> <span word="stops">stops</span> <span word="working">working</span> <span word="you">you</span> <span word="can">can</span> <span word="use">use</span> <span word="the">the</span> <span word="other">other</span> <span word="one">one</span>,<span word="Or">Or</span> <span word="you">you</span> <span word="can">can</span> <span word="have">have</span> <span word="them">them</span> <span word="come">come</span> <span word="in">in</span> <span word="from">from</span> <span word="all">all</span> <span word="different">different</span> <span word="angles">angles</span>,<span word="And">And</span> <span word="what">what</span> <span word="if">if</span> <span word="the">the</span> <span word="asteroid">asteroid</span> <span word="is">is</span> <span word="irregularly">irregularly</span> <span word="shaped">shaped</span> (<span word="like">like</span> <span word="this">this</span>).<span word="you">you</span> <span word="could">could</span> <span word="beam">beam</span> <span word="it">it</span> <span word="when">when</span> <span word="the">the</span> <span word="thing">thing</span> <span word="is">is</span> <span word="smooth">smooth</span>,<span word="and">and</span> <span word="then">then</span> <span word="when">when</span> <span word="theres">theres</span> <span word="a">a</span> <span word="pit">pit</span> <span word="or">or</span> <span word="an">an</span> <span word="inefficient">inefficient</span> <span word="place">place</span> <span word="to">to</span> <span word="be">be</span> <span word="beaming">beaming</span> <span word="you">you</span> <span word="turn">turn</span> <span word="off">off</span>,<span word="you">you</span> <span word="wait">wait</span> <span word="for">for</span> <span word="the">the</span> <span word="asteroid">asteroid</span> <span word="to">to</span> <span word="turn">turn</span>,<span word="then">then</span> <span word="you">you</span> <span word="turn">turn</span> <span word="it">it</span> <span word="back">back</span> <span word="on">on</span>.另外你送去了一群这样的激光航天器，如果一个停止工作了 你还可以使用另一个，或者你可以让它们从不同角度切入，如果小行星的形状不规则（像这样）,你可以把表面烤到光滑，当出现一个坑或者有照射不足的地方时 你把激光关掉，你等着行星转一圈之后再把激光打开。<span word="You">You</span> <span word="see">see</span> <span word="everybody">everybody</span>,<span word="just">just</span> <span word="beacuse">beacuse</span> <span word="its">its</span> <span word="unlikely">unlikely</span> <span word="doesnt">doesnt</span> <span word="mean">mean</span> <span word="its">its</span> <span word="not">not</span> <span word="a">a</span> <span word="big">big</span> <span word="deal">deal</span>.<span word="You">You</span> <span word="know">know</span> <span word="if">if</span> <span word="it">it</span> <span word="only">only</span> <span word="happens">happens</span> <span word="once">once</span> <span word="every">every</span> <span word="few">few</span> <span word="thousand">thousand</span> <span word="years">years</span>,<span word="Well">Well</span> <span word="if">if</span> <span word="it">it</span> <span word="happens">happens</span> <span word="on">on</span> <span word="my">my</span> <span word="watch">watch</span> <span word="it">it</span> <span word="would">would</span> <span word="as">as</span> <span word="the">the</span> <span word="kids">kids</span> <span word="say">say</span> <span word="suck">suck</span>. <span word="Okay">Okay</span>,<span word="so">so</span> <span word="we">we</span> <span word="dont">dont</span> <span word="want">want</span> <span word="that">that</span> <span word="to">to</span> <span word="happen">happen</span>,<span word="we">we</span> <span word="want">want</span> <span word="to">to</span> <span word="avoid">avoid</span> <span word="that">that</span>.你们看到了吗 事情不太可能发生并不意味着它不重要,你知道 即使它几千年才会发生一次，如果在我们观察时这事发生了 我会和孩子一样说“擦”,好的 我们不想让这事发生 我们要躲着它。<span word="Asteroids">Asteroids</span> <span word="are">are</span> <span word="serious">serious</span> <span word="business">business</span>,<span word="but">but</span> <span word="theyre">theyre</span> <span word="exciting">exciting</span>. （<span word="spaceship">spaceship</span> <span word="noise">noise</span>）<span word="Except">Except</span> <span word="we">we</span> <span word="are">are</span> <span word="in">in</span> <span word="space">space</span> <span word="so">so</span> <span word="its">its</span> (<span word="silence">silence</span>)(航天器噪声）除了我们在太空时 它此时（无声）行星需要被认真对待 但是它们让我们兴奋，</p>

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