A wing-like extension from the body of a fish that helps to move, balance, or steer it in the water.

鳍。

A small vertical or horizontal plane or wing on an airplane, to promote stability or steadiness.

飞机之翼。

One of the projecting ridges on engine parts to aid in dissipating heat.

(装在引擎上的)散热片。

Any finlike part, as on a ship.

(船的)水平舵。

Five dollar bill.

【俚】五元硬币。