短语词组短语fish swim -bladder 鱼鳔swim -bladder 泳鳔alaska cod swim -bladder 大头鳕鳔marine eel swim -bladder 海鳗鳔blue shark swim -bladder 大青鲨鳔gummy shark swim -bladder 鲛鲨白swim bladder membrane 鱼鳔膜 返回 swim bladder