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单词
atomic-beam frequency standard
释义
atomic-beam frequency standard
atomic-beam frequency standard
[
ə′täm·ik ‚bēm ′frē·kwən·sē ‚stan·dərd
]
(physics)
A source of precisely timed signals which are derived from an atomic-beam resonance, such as a cesium-beam cell or a hydrogen maser.
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left or right
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left otitis media
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left our mark
left our marks
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更新时间:2025/2/5 23:24:47