Fin.

常见例句

A feather, wing, fin, or similar appendage.
羽、翼或鳍状结构羽、翼、鳍或类似的悬着物
The shark's fin sliced the water.
鲨鱼的背鳍像刀样迅速划破水面。
The shark's dorsal fin was cut off by the fisherman.
鲨鱼的背鳍被渔夫割了下来。
Come, old fellow, tip us your fin.
得了，老朋友，跟我们握握手吧。
He was the first to spy the triangle fin of a shark coming towards us.
他第一个发现一条鲨鱼的三角形鳍向我们游来。
A surfboard fin sliced the crest of a wave.
冲浪板尾部划破浪尖。