请输入您要查询的英文单词：
单词
fraunhofer spectrum
释义
Fraunhofer spectrum
Fraunhofer spectrum
[
′frau̇n‚hōf·ər ‚spek·trəm
]
(spectroscopy)
The absorption lines in sunlight, due to the cooler outer layers of the sun's atmosphere.
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更新时间：2024/9/23 7:26:25