adj. pectoral
misc. pectoral fin
... 背鳍 pinna dorsalis; dorsal fin 胸鳍 pinna pectoralis; pectoral fin 外耳壳 pinnae ...
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位于靠近头后面的更小的胸鳍用于控制方向。
Even smaller pectoral fins located near the back of the head are used for steering.
达到空中后，他们利用身侧的长胸鳍及短腹鳍产生升力，类似于机翼。
Once airborne, they use long pectoral fins and shorter pelvic fins on the sides of their bodies to create lift, much like the wings of an aircraft.
在北海道外的浅水水域，一只带刺的入侵者利用胸鳍刺爬过闪亮的火山砂。
In the shallow waters off Hokkaido, a barbed poacher crawls across glistening volcanic sand on spiny pectoral fins.
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