中生代的几种水生爬行动物，身体象海豚，有背鳍和尾鳍，四肢形如浆。

中生代的几种水生爬行动物，身体象海豚，有背鳍和尾鳍，四肢形如浆。的英文翻译

基本释义

• any of several marine reptiles of the Mesozoic having a body like a porpoise with dorsal and tail fins and paddle-shaped limbs.