abdominal fins Applied to ventral fins when inserted far behind pectorals.
腹鳍腹侧成对的鳍，在胸鳍后方远处。
I was required to hold out my arms and flex my pectorals.
我被要求伸展手臂，收紧胸肌。
Train pectorals, Triceps, Frontal deltoids. Develop upper body, improve body shape.
练习胸大肌，肱三头肌，三角肌前部。发展上肢肌肉，改善形体。
His dorsal fin was down and his huge pectorals were spread wide.
它的脊鳍向下耷拉着，巨大的胸鳍大张着。
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