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单词 polar front
释义

WordReference Random House Unabridged Dictionary of American English © 2024
polar front′, 
  1. Meteorologythe variable frontal zone of middle latitudes separating air masses of polar and tropical origin.
  • 1915–20

Collins Concise English Dictionary © HarperCollins Publishers::
polar front n
  1. a front dividing cold polar air from warmer temperate or tropical air
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