dosal fin

• 背鳍

dosal fin的用法和样例：

例句

1. The shark's fin sliced the water.
   鲨鱼的背鳍像刀样迅速划破水面。
2. Now he speeded up as he smelled the fresher scent and his blue dorsal fin cut the water.
   那条鲨鱼闻到了新鲜的血腥味，正加速航行，蓝色的背鳍在水中划过。