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.

它们还必须不停地游动以避免下沉，因为大多数鱼基本上或完全失去了鱼鳔，这个充满气体的囊帮助大多数其他鱼保持浮力。

youdao

A pneumatocele is a thin-walled, gas-filled space in the lung.

肺膨出为肺内薄壁的充气气腔。

youdao

A gas-filled ionization chamber USES this principle.

充气电离室就是利用这一原理。

youdao

One way to compute its value is to shine light through a gas-filled container.

ECONOMIST: Fundamental physics

Packages covered with a sealed layer of clear plastic are modified-atmosphere packages, which have a gas-filled space inside to help preserve freshness and color.

CNN: How to buy the best beef

Douglas Beman, 30, of Greenburgh, was thinking of Sandy and the long gas lines that followed it as he filled his Tahoe and a 5-gallon gas can at a Mobil station.

WSJ: New Yorkers remember Sandy, scramble for supplies