oil sac

例句：

1. 1. Theworker carefully removed the oil sac fromthe engine.
   工人小心翼翼地从引擎中取出油囊。
2. 2. The oil sac was filledwith diesel fuel.
   油囊里装满了柴油燃料。
3. 3. The oil sac was usedto contain the spilled oil.
   油囊用来存放溢出的油。