小测验：选择正确的单词
sunspot ['sʌnspɔt]
基本释义
参考例句
- The darkest region of a sunspot.
太阳黑子中的最黑暗的区域 - The grayish outer part of a sunspot.
太阳黑子周围较浓的浅灰区
英英解释
- a cooler darker spot appearing periodically on the sun's photosphere; associated with a strong magnetic field
[同]
macula, sunspot
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