gaseous insulation

例句：

1. 1. The room was filled with the scentof burning gas.
   房间里充满了燃烧气体的气味。
2. 2.Gases are composed of molecules that canbe broken down into simpler substances.
   气体是由可以分解成更简单物质的分子组成的。
3. 3. The scientist conducted experiments to studythe properties of gaseous matter.
   科学家进行了实验，研究气体物质的性质。