| 词汇 | helium |
| 释义 | helium 1 ENTRIES FOUND: helium (noun) helium /ˈhiːlijəm/ noun helium /ˈhiːlijəm/ noun Learner's definition of HELIUM [noncount] : a chemical element that is a colorless gas, that is lighter than air, and that is often used to fill balloons氦；氦气 |
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