研究发现：15年内北极将迎来“无冰”夏季
<p>科学家的一项研究发现再一次给人类敲响了警钟。新研究显示，因为全球变暖，15年内北极的夏季将会没有冰。</p><p><span word="A">A</span> <span word="study">study</span> <span word="suggests">suggests</span> <span word="that">that</span> <span word="the">the</span> <span word="Arctic">Arctic</span> "<span word="may">may</span> <span word="be">be</span> <span word="essentially">essentially</span> <span word="ice">ice</span>-<span word="free">free</span> <span word="during">during</span> <span word="summer">summer</span> <span word="within">within</span> 15 <span word="years">years</span>."</p><p>一项研究显示，北极“在15年内可能会在夏季基本无冰”。</p>
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