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单词
helium-4
释义
helium-4
\¦ ̷ ̷ ̷ ̷ ̷ ̷ ˈ ̷ ̷ \
noun
Etymology:
helium + 4
, mass number of the isotope
:
helium
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更新时间:2025/12/6 1:18:37