The inner envelope filled with helium in the head section of the blimp and the third built-in airbag at the tail is filled with ethane combustible gas.
飞船头部的内置气囊中充满了氦气，而置于尾部的第三节内置气囊则充满了乙烷可燃气体。
2
Before going to the gas station to have his tank filled, John had his emergency brake checked and fixed at the service station near the local cinema.
去加油站把油罐加满之前，约翰在当地电影院附近的服务站检查并修好了他的紧急刹车。
3
They must also keep swimming to keep from sinking, since most have largely or completely lost the swim bladder, the gas-filled sac that helps most other fish remain buoyant.