鳍状肢;脚蹼
Similar in structure and evolutionary origin,though not necessarily in function,as the flippers of a seal and the hands of a human being.
同源的在结构和进化起源上相似,尽管功能不一定相似,象海豹的鳍状肢和人手
Of or belonging to the Pinnipedia,a suborder of carnivorous aquatic mammals that includes the seals,walruses,and similar animals having finlike flippers as organs of locomotion.
有鳍状肢的属于鳍脚亚目动物的,肉食水生动物的一个分支,包括海狮、海象及其他类似的用鳍状肢行进的动物
A large marine mammal(Odobenus rosmarus)of Arctic regions,related to the seals and having two long tusks,tough wrinkled skin,and four flippers.
海象一种北冰洋一带的大型海中哺乳动物,(海象海象属),与海豹有关,长有一对长牙、粗糙的褶皱外皮及四只鳍状肢
Seals, turtles and penguins have flippers
海豹、海龟、企鹅均有鳍状肢