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质量数 /zhìliàngshù/ meaning in English

ChineseEnglish
质量数 /zhìliàngshù/ noun

mass number [mass numbers](number of protons and neutrons in an atomic nucleus)
noun
[UK: mæs ˈnʌm.bə(r)] [US: ˈmæs ˈnʌm.br̩]