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单词 Scheiner speed
释义

Scheiner speed

noun

Schei·​ner speed
ˈshīnə(r)-
: the speed of photographic material based on the exposure required to obtain a just-detectable density and indicated by a system of numbers

Word History

Etymology

after Julius Scheiner †1913 German astrophysicist

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更新时间:2024/9/22 9:43:48