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单词
secondary beam
释义
WordReference Random House Unabridged Dictionary of American English © 2024
sec
′
ondary beam′,
[
Physics.
]
Physics
a beam of particles of one kind selected from the group of particles produced when a beam of particles from an accelerator (
primary beam
) strikes a target.
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更新时间:2025/9/21 5:38:06