趣英语 / helium例句

helium例句

Helium is a very light gas.
氦是一种非常轻的气体。

Helium is a gas used in balloons.
氦是一种用于气球的气体.

Unlike helium - 4, it cannot be produced by radioactive decay.
与氦 - 4不同之处是, 氦-3不能由放射性衰变产生.

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