它们总是脱离主冰帽，在洋流的推动下四处漂浮，直到最终融化并被晒干。
They are always breaking away from the main caps and floating around, pushed by currents, until they eventually melt and are was ted.
在资助政策的推动下，2007年有一半的欧洲研究论文有国际合作作者，这是20年前水平的两倍多。
Spurred on by funding policies, half of the European research articles had international co-authors in 2007, this is more than twice the level of two decades ago.
事实上，一些科学家认为，人类历史不仅仅受到全球气候变化的影响；在某些情况下，它还受到全球气候变化的推动。
Indeed, the human history has not been merely touched by global climate change, some scientists argue, it has in some instances been driven by it.
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