英语词汇“polar cap”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	polar cap
释义	polar cap polar cap n. Either of the regions around a planet's poles that are permanently covered with ice or other frozen material. Also called polar ice cap. polar cap 1. The mass of permanent ice that covers either of the Earth's polar regions.2. The mass of frozen carbon dioxide and water that covers either of Mars's polar regions. polar cap polar cap [′pō·lər ‚kap] (astronomy) Any of the bright areas covering the poles of Mars, believed to be composed of frozen carbon dioxide and water-ice. (hydrology) An ice sheet centered at one of the poles of the earth.
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