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单词
aston dark space
释义
as·ton dark space
\ˈastən-\
noun
Usage:
usually capitalized A
Etymology:
after Francis W.
Aston
died 1945 English chemist and physicist
:
a nonluminous layer between the cathode surface and the cathode glow in a vacuum tube
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eudiometric
eudist
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更新时间:2026/6/26 14:24:37