Great Barrier Reef destruction, mission to clean space 澳洲大堡礁珊瑚大规模死亡、清理太空垃圾
<p><span word="Great">Great</span> <span word="Barrier">Barrier</span> <span word="Reef">Reef</span> <span word="destruction">destruction</span>, <span word="mission">mission</span> <span word="to">to</span> <span word="clean">clean</span> <span word="space">space</span> 澳洲大堡礁珊瑚大规模死亡、清理太空垃圾</p><p>本集内容<span word="Worst">Worst</span> <span word="destruction">destruction</span> <span word="ever">ever</span> <span word="for">for</span> <span word="Great">Great</span> <span word="Barrier">Barrier</span> <span word="Reef">Reef</span> 澳洲大堡礁珊瑚群遭受空前破坏</p><p><span word="Mission">Mission</span> <span word="to">to</span> <span word="clean">clean</span> <span word="space">space</span> 科学家将清理地球轨道上的太空垃圾</p><p><span word="The">The</span> <span word="planet">planet</span>'<span word="s">s</span> <span word="largest">largest</span> <span word="living">living</span> <span word="structure">structure</span> <span word="struggling">struggling</span> <span word="for">for</span> <span word="survival">survival</span>. <span word="This">This</span> <span word="coral">coral</span> <span word="should">should</span> <span word="be">be</span> <span word="alive">alive</span> <span word="with">with</span> <span word="colour">colour</span> <span word="but">but</span> <span word="it">it</span>'<span word="s">s</span> <span word="bleached">bleached</span> <span word="and">and</span> <span word="barren">barren</span>. <span word="These">These</span> <span word="scientists">scientists</span> <span word="are">are</span> <span word="part">part</span> <span word="of">of</span> <span word="a">a</span> <span word="team">team</span> <span word="that">that</span>'<span word="s">s</span> <span word="assessed">assessed</span> <span word="the">the</span> <span word="health">health</span> <span word="of">of</span> <span word="the">the</span> <span word="entire">entire</span> <span word="Great">Great</span> <span word="Barrier">Barrier</span> <span word="Reef">Reef</span> – <span word="an">an</span> <span word="area">area</span> <span word="bigger">bigger</span> <span word="than">than</span> <span word="Britain">Britain</span> – <span word="and">and</span> <span word="here">here</span> <span word="the">the</span> <span word="prognosis">prognosis</span> <span word="is">is</span> <span word="poor">poor</span>. <span word="On">On</span> <span word="average">average</span>, <span word="two">two</span>-<span word="thirds">thirds</span> <span word="of">of</span> <span word="the">the</span> <span word="coral">coral</span> <span word="in">in</span> <span word="the">the</span> <span word="northern">northern</span> <span word="section">section</span> <span word="has">has</span> <span word="died">died</span>.</p><p>地球上最大的生态结构大堡礁正在艰难地求生。这丛珊瑚本应生机勃勃、色彩鲜艳，但它现在已经褪色，贫瘠而荒芜。这些科学家隶属一支评估了整个大堡礁健康状况的研究小组。澳洲大堡礁的面积大于英国总面积，而目前科学家在评估后对其健康做出的预测是“情况不佳”。平均来看，大堡礁北部的珊瑚有三分之二已经死亡。</p><p><span word="We">We</span>'<span word="ve">ve</span> <span word="been">been</span> <span word="space">space</span>-<span word="bound">bound</span> <span word="since">since</span> <span word="the">the</span> 1950<span word="s">s</span>, <span word="making">making</span> <span word="amazing">amazing</span> <span word="progress">progress</span> <span word="and">and</span> <span word="countless">countless</span> <span word="scientific">scientific</span> <span word="discoveries">discoveries</span>. <span word="But">But</span> <span word="for">for</span> <span word="every">every</span> <span word="advance">advance</span> <span word="we">we</span>'<span word="ve">ve</span> <span word="left">left</span> <span word="something">something</span> <span word="behind">behind</span> – <span word="space">space</span> <span word="junk">junk</span>. <span word="At">At</span> <span word="the">the</span> <span word="University">University</span> <span word="of">of</span> <span word="Southampton">Southampton</span>, <span word="scientists">scientists</span> <span word="are">are</span> <span word="watching">watching</span> <span word="this">this</span> <span word="waste">waste</span>. <span word="There">There</span> <span word="are">are</span> <span word="now">now</span> <span word="thought">thought</span> <span word="to">to</span> <span word="be">be</span> 22,000 <span word="bits">bits</span> <span word="of">of</span> <span word="space">space</span> <span word="rubbish">rubbish</span> <span word="bigger">bigger</span> <span word="than">than</span> 10 <span word="centimetres">centimetres</span>.</p><p>从五十年代起，人类就开始探索太空，不断地取得惊人的进步，并做出不胜枚举的科学发现。然而，每当我们取得了一点进步时也在太空中留下了一些东西，这些物品被称作“太空垃圾”。英国南安普顿大学的科学家们正对这些废品进行观测。目前，人们认为共有两万两千块长度大于10厘米的太空垃圾。</p>
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