“atomic second”的概念、定义、翻译、参考文献-科学参考

单词	atomic second
释义	atomic second [ǝ`täm·ik `sek·ǝnd] ^PHYSICS As defined in 1967, the duration of 9,192,631,770 periods of the radiation corresponding to the two hyperfine levels of the fundamental state of the atom of cesium-133.
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