当前全球变暖的趋势又促使地球由“冰室”——有许多大冰原和冰川，转变为“温室”——冰量总体上减少。巴克尔说。

The current trend of global warming is pushing Earth back from its ice Age "icehouse" conditions-with large ice sheets and many glaciers-to a "greenhouse" with little ice overall, Barker noted.

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科学家们也想弄明白，在500万年前，地球气候变冷，由“温室”变成“冰室”的时候，当地的森林出现了怎样的反应。

The scientists also want to get a better idea of how the local forest responded as the planet cooled around five million years ago, changing from "greenhouse" to "icehouse" conditions.

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这些天然冰雕式样繁多，结构奇特，其中包括一种最为神奇的“瑞士干酪”冰山，这种冰山看起来就像是被钻出了许多的深洞，有些洞穴甚至形成了巨大的冰室。

The vast array of frozen sculptures includes 'Swiss cheese' icebergs which appear to have deep holes drilled into them and some that have formed gigantic cathedrals of ice.

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