| 单词 | coronal hole |
| 释义 | coronal holenoun Astronomy.a part of the solar corona that appears dark on optical and x-ray images and is characterized by low temperature and low density. Origin of coronal holeFirst recorded in 1970–75 Words nearby coronal holeCoronado, Coronado, Francisco, corona glandis, coronagraph, coronal, coronal hole, coronal mass ejection, coronal plane, coronal suture, corona radiata, coronarism Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 |
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