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单词
population inversion
释义
WordReference Random House Unabridged Dictionary of American English © 2024
popula
′
tion inver′sion,
[
Physics.
]
Physics
a condition of matter in which more electrons are in a high energy state than in a lower energy state, as is required for the operation of a laser.
1960–65
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更新时间:2025/7/23 13:25:31