Ballonets
n. 升降气袋；小气囊
🗣️ 情景例句
A taxi can get you there in less than five minutes.
乘坐的士到那儿不用5分钟。
He that would have eggs must endure the cackling of hens.
欲图逸，得先劳。
While the men had been working inside the ship, the air-line had been giving off oxygen.
当工人们的在船舱里干活时，供气管一直在排放氧气。