air bladder
基本解释
[医] 气囊, 气泡
英文释义
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.
A sac or bladder full of air in an animal or plant; also
an air hole in a casting.
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