poisonous gas 和poison gas 有什么区别
poisonous gas 和poison gas 有什么区别
toxic gas和poisonous gas 有何区别?
poisonous和poison有什么区别
gas oil和diesel有什么区别?
gas和vapor有什么区别
gas 和gasoline有区别吗?
gas
Last summer he taught us( )poisonous gas
gas和oil有什么区别,为什么英语中加油时都会用到这两个词?
gas,gasoline,petrol,petroleum什么区别啊
Gas Hydrate与natural gas的区别
this poisonous gas was quickly building up 中building up