helium
🇺🇸
/ˈhiːliəm/
🇬🇧
/ˈhiːliəm/
A colorless, odorless, tasteless, nonflammable, noble gas.
We filled the balloons with helium to make them float in the air.
我們用氦氣給氣球充氣,使它們在空中漂浮。