英文英文字典
英文英文字典
古腾堡计划中的在线英语-英语词典
结果
Air bladder的结果
Air bladder
An air sac, sometimes double or variously lobed, in the
visceral cavity of many fishes. It originates in the same way as the
lungs of air-breathing vertebrates, and in the adult may retain a
tubular connection with the pharynx or esophagus.
Air bladder
A sac or bladder full of air in an animal or plant; also
an air hole in a casting.