gas

• The enemy went so far as to use poison gas .
  敌人居然使用了毒气。
• The gases pass into the exhaust manifold .
  这些废气进入排气歧管。
• Sample gas tubes are flushed with nitrogen .
  采气管得用氮气吹扫。
• Did you have gas or an injection ?
  你是用的麻醉气还是打的麻醉针？
• It is not easy to humidity a gas completely .
  要完全增湿气体是不容易的。
• A gas is squeezed into a smaller volume .
  气体受挤压而体积减小。
• It 's more economical to use gas than coal ..
  烧煤气比烧煤上算。
• She was intelligent enough to turn off the gas ...
  她够机灵地关掉了煤气。
• Natural gas will be the first to run out .
  天然气将首先被用完。
• The gas is heated by photoionization .
  气体是由光致电离加热的。