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pectoral fin /ˈpɔːz ˈslaʃ ˈstɪl ˈbʌtən/ n

中文：胸鳍

中文 · 胸鳍Español · aleta pectoralFrançais · nageoire pectorale
Meaning：Swimming appendage made of bone that ensures stability, orientation, stopping and thermoregulation.
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Perch anatomy Cartilaginous fish Dolphin anatomy

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