deuterium
/djuːˈtɪɹi.əm/ 名词 C2中文： 氘
- An isotope of hydrogen with one proton and one neutron in each atom - 21H. · Heavy water is "heavy" because it contains deuterium.
- An atom of this isotope. · There were about 80 deuteriums for every million protiums, and virtually no tritium.
复数 deuteriums
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