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单词
coronal hole
释义
WordReference Random House Unabridged Dictionary of American English © 2024
coro
′
nal hole
′
,
[
Astron.
]
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.
1970–75
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更新时间:2025/11/25 18:15:20