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单词
m-shell
释义
WordReference Random House Unabridged Dictionary of American English © 2024
M-shell
(em
′
shel′),
USA pronunciation
n.
[
Physics.
]
Physics
the third shell of electrons surrounding the nucleus of an atom and containing, when filled, 18 electrons having principal quantum number three. Cf.
K-shell, L-shell, N-shell.
1920–25
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更新时间:2026/2/5 15:59:26