gaseous state

例句：

1. 1. The balloon was filled with helium gas.
   这个气球被氦气充满了。
2. 2.The atmosphere is mostly composed of gaseous molecules.
   大气主要由气体分子组成。
3. 3. Gases are made up of tiny particles that can be compressed or expanded.
   气体是由可以压缩或膨胀的小粒子组成的。