swim bladder是什么意思 swim bladder怎么读
swim bladder的英文翻译是什么意思，词典释义与在线翻译
Noun:- an air-filled sac near the spinal column in many fishes that helps maintain buoyancy
swim bladder的用法和样例
用作名词 (n.)
- The bladder is thin-walled and closed by a one-way valve.
浮囊具有薄壁的结构并且通过单方向的阀门关闭。 - The swim bladder is like a balloon.
鱼鳔就像一只气球。
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