| 单词 | mass unit |
| 释义 | > as lemmasmass unit mass unit n. = atomic mass unit n. at atomic mass n. Compounds. ΘΚΠ the world > matter > physics > atomic physics > [noun] > atomic mass > unit of mass unit1942 atomic mass unit1954 1942 E. C. Pollard & W. L. Davidson Appl. Nucl. Physics v. 74 If a positron is emitted it must be treated as costing 0·0011 mass unit or 1 Mev extra. 1966 F. T. Gucker & R. L. Seifert Physical Chem. (1967) ii. 25 Prior to 1961 two different mass units were used: the physical mass unit..and the chemical mass unit. < as lemmas |
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