Level 5 · word 8,785 of 20,000
helium
/ˈhiːliəm/
American
- n. 氦, 氦气
- Definition
- n. a light colorless gas used in balloons and airships
- Example
- The balloon floated up because it was filled with helium.
- 气球飘了起来，因为里面充的是氦气。
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