adj.背的,脊的,背部的,背面的
There are usually no dorsal pores in the first few intersegmental grooves.
身体前几个节间沟内经常无背孔.
His dorsal fin was down and his huge pectorals were spread wide.
它的脊鳍朝下耷拉着,巨大的胸鳍大张着.
a shark's dorsal fin
鲨鱼的背鳍