open vent的用法和樣例：
例句
- When the vent became plugged, the engine would stop.
當通風(fēng)口被堵塞時(shí)，發(fā)動(dòng)機就會(huì )停轉。 - They never made it that far Wednesday, when hydrogen gas spewed into the air from a vent line connected to Discovery's external fuel tank.
周三，氫氣從連接到發(fā)現號外部燃料箱的通風(fēng)口中泄露，這阻止了他們登機。
