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单词
carbon 12
释义
carbon 12
carbon 12
or
carbon-12,
n.
the isotopic carbon atom used as the standard for atomic weight.
[1940–45]
carbon 12
car·bon 12 (
12
C),
(
kar'bŏn
),
The standard of atomic mass, 98.90% of natural carbon.
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更新时间:2025/2/28 18:59:23