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Analyses reveal that the number of papers including the keywords "environmental change" or "climate change" has increased rapidly since 2004.

分析显示，自2004年以来，包含“环境变化”或“气候变化”等关键词的论文数量迅速增加。

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Chinese researchers published more than triple the number of papers in 2009 as in 2005.

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The number of papers opposing compulsory health insurance has jumped from about 100 to 432.

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There have been a number of papers in the last decade on electrical charging of space vehicles.

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