飞机的窗户和座位,原来藏着这种心机
<p><span word="There">There</span> <span word="are">are</span> <span word="roughly">roughly</span> 102,465 <span word="commercial">commercial</span> <span word="flights">flights</span> <span word="each">each</span> <span word="day">day</span> <span word="which">which</span>, <span word="over">over</span> <span word="a">a</span> <span word="year">year</span>, <span word="equates">equates</span> <span word="to">to</span> <span word="about">about</span> <span word="four">four</span> <span word="billion">billion</span> <span word="air">air</span> <span word="passengers">passengers</span> <span word="per">per</span> <span word="year">year</span>.</p><p>世界上每天都有大概102,465个班次的商业航班，换算成一年，差不多就是40亿人次。</p><p><span word="That">That</span>'<span word="s">s</span> <span word="over">over</span> <span word="half">half</span> <span word="of">of</span> <span word="the">the</span> <span word="world">world</span>'<span word="s">s</span> <span word="population">population</span> <span word="who">who</span>'<span word="ve">ve</span> <span word="sat">sat</span> <span word="on">on</span> <span word="a">a</span> <span word="flight">flight</span>, <span word="often">often</span> <span word="for">for</span> <span word="hours">hours</span> <span word="on">on</span> <span word="end">end</span>, <span word="and">and</span> <span word="had">had</span> <span word="time">time</span> <span word="to">to</span> <span word="think">think</span> <span word="about">about</span> <span word="planes">planes</span> <span word="and">and</span> <span word="ask">ask</span> <span word="questions">questions</span> <span word="about">about</span> <span word="them">them</span>.</p><p>这所有坐过飞机的人已经超过地球人口的一半了，而且他们通常一坐就是几小时，有充足的时间来思考飞机的方方面面并对它们提出问题。</p><p><span word="If">If</span> <span word="you">you</span>'<span word="ve">ve</span> <span word="ever">ever</span> <span word="stared">stared</span> <span word="out">out</span> <span word="the">the</span> <span word="window">window</span> <span word="as">as</span> <span word="your">your</span> <span word="plane">plane</span> <span word="takes">takes</span> <span word="off">off</span>, <span word="you">you</span> <span word="will">will</span> <span word="have">have</span> <span word="seen">seen</span> <span word="a">a</span> <span word="tiny">tiny</span> <span word="hole">hole</span> <span word="in">in</span> <span word="your">your</span> <span word="window">window</span>.</p><p>如果你曾经在飞机起飞的时候盯着窗外看，你会发现窗子上是有小洞的。</p><p><span word="At">At</span> <span word="first">first</span>, <span word="it">it</span> <span word="may">may</span> <span word="seem">seem</span> <span word="like">like</span> <span word="a">a</span> <span word="weird">weird</span> <span word="addition">addition</span>, <span word="especially">especially</span> <span word="in">in</span> <span word="something">something</span> <span word="that">that</span>'<span word="s">s</span> <span word="carrying">carrying</span> <span word="a">a</span> <span word="lot">lot</span> <span word="of">of</span> <span word="people">people</span> <span word="at">at</span> <span word="a">a</span> <span word="great">great</span> <span word="height">height</span>, <span word="but">but</span> <span word="they">they</span>'<span word="re">re</span> <span word="there">there</span> <span word="for">for</span> <span word="a">a</span> <span word="very">very</span> <span word="important">important</span> <span word="reason">reason</span>: <span word="to">to</span> <span word="stop">stop</span> <span word="the">the</span> <span word="cabin">cabin</span> <span word="from">from</span> <span word="depressuring">depressuring</span>.</p><p>乍看之下，这个细节很诡异，尤其是它还出现在一个载着这么多人、飞得这么高的东西上，但其实它是有重要作用的：防止机舱减压。</p><p><span word="As">As</span> <span word="the">the</span> <span word="plane">plane</span> <span word="gains">gains</span> <span word="altitude">altitude</span>, <span word="the">the</span> <span word="air">air</span> <span word="pressure">pressure</span> <span word="outside">outside</span> <span word="drops">drops</span> <span word="compared">compared</span> <span word="to">to</span> <span word="the">the</span> <span word="regulated">regulated</span> <span word="air">air</span> <span word="pressure">pressure</span> <span word="inside">inside</span> <span word="the">the</span> <span word="cabin">cabin</span>.</p><p>随着飞机的飞行高度增加，飞机外面的气压会低于飞机内收到调控的气压。</p>
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