either of a pair of fins attached to the pelvic girdle in fishes that help control the direction of movement; correspond to hind limbs of a land vertebrate
pelvic fin 片语
片语
pelvic c fin腹鳍
Pelvic Fin Base腹鳍鳍基
pelvic fin length腹鳍长
origin of pelvic fin腹鳍起点
Pelvic fin inner margin腹鳍内缘
Pelvic fin height腹鳍高
Pelvic fin base length腹鳍鳍基长
Pelvic Fin Posterior Margin腹鳍后缘
Pelvic Fin Anterior Margin腹鳍前缘
ventral fin腹鳍
pelvic fin 例句
英汉例句
in each type, fish body may produce varied changes and form some appendages, such as oral disk, pelvic fin disk and thorax disk.