名词
中文翻译：极地冰盖同义词
同义词：
['polar ice sheet', 'polar ice cap', 'polar ice shelf']
例句：
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1. The polar caps are the thickest parts of the Earth's icy crust.
极地冰盖是地球最厚的冰层部分。
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2. The polar caps are crucial for the survival of many species that depend on them.
极地冰盖对依赖它们的许多物种的生存至关重要。
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3. The melting of polar caps is a major concern for climate change.
极地冰盖的融化是气候变化的一个主要担忧。