气体交换

气孔：植物叶片表皮存在的数目众多的小孔，打开时允许气体自由出入进行交换。

gaseous

decomposition of rock phosphate using wet gaseous acids

de-liquefying apparatus for gaseous fuels stored in liquid form for combustion engines

gaseous fluid

matter, fluent, liquid, gaseous

gaseous, matter

STOVES using gaseous or liquid fuels

gaseous state