swimming bladder 中文意思是什麼
swimming bladder
解釋
魚鰾。-
All sharks lack a swim bladder, so that their bodies are not buoyed up in the water and they have to keep swimming or they sink
體內沒有魚鰾,因此身體不會自動浮升,必須不斷游泳,防止沉下水底。
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