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单词
fraunhofer lines
释义
fraun·ho·fer lines
\ˈfrau̇nˌhōfə(r)\
noun
Usage:
usually capitalized F
Etymology:
after Joseph von
Fraunhofer
died 1826 Bavarian optician and physicist
:
any of the dark lines in the spectrum of sunlight
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更新时间:2025/7/30 3:37:06