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单词 hevelian halo
释义

WordReference Random House Unabridged Dictionary of American English © 2024
He•veli•an halo  (hə vālē ən),USA pronunciation 
  1. Astronomya faint white halo with an angular radius of 90° that is occasionally seen around the sun or the moon, thought to be caused by the reflection and refraction of sunlight by ice crystals.
  • see -ian after J. Hevelius

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更新时间:2024/9/21 14:39:01