Most polar bears could disappear by the end of the century because of global warming, scientists say.

科学家称，由于全球变暖，多数北极熊可能会在本世纪末消失。

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As the researchers pointed out, because polar bears live primarily on sea ice, their remains often end up in the ocean.

如同研究人员指出的，由于北极熊都生活在海冰上，它们的尸体最终留在了海洋中。

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The plumber had always been lucky at games. But the day he went to the carnival with the polar bear it all came to a poignant end.

这个水暖工玩游戏时一贯幸运，但是那天他和北极熊一起去参加欢庆会时，他的运气令人痛苦地结束了。

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It is almost certain there'll be a gap in the acquisition of civilian US polar satellite meteorological data at the end of this decade.

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