either of a pair of fins situated just behind the head in fishes that help control the direction of movement
双语例句
1. The first pectoral fin ray of the male is somewhat thicker than that of female.
第一胸鳍曙光男是有点粗多于女生。
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2. Dorsal fin, tail fin and fat fins slightly yellow, pectoralfin, and ventral fin Tunqi gray.
背鳍、脂鳍和尾鳍稍带浅黄色，胸鳍、腹鳍和臀鳍灰白色。
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3. The ups and downs experiment proves that the pectoralfin on different angle influences the fish to move ups and downs.
在机器鱼的升潜试验中论证了胸鳍不同转角对升潜运动的影响。
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4. Crucian carp shouted, and forced to jump up, this time with a twelve component, even the tail and pectoral fin tip is very up.
鲫鱼大声喊着，又用力向上跳，这回用了十二分力，连尾巴和胸鳍的尖端都挺了起来。
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5. Male anemonefish frequently visits the nest to fan the eggs with his pectoral fin and to remove dead eggs and debris with his mouth.
雄性小丑鱼的责任是守卫著正在孵化的胚胎；牠还经常为巢穴打扫或去除己死的胚胎。
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6. The pectoralfin motion model and the hydrodynamic performance's data which we obtained in this thesis are useful for our future design work.
本论文工作对未来相关仿生水下机器人的设计开发工作具有参考价值。
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7. The regression tests in which separated bacteria were injected in the bottom of pectoralfin were all presented with symptoms similar to the natural incidence.
分离菌经胸鳍基注射回归感染试验均出现与自然发病相似的症状。
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8. Finally they tied ropes to the shark's tail fin and behind its pectoral fin, and attached these ties to the rescue vessel, which towed the shark out through the harbour estuary.
最后他们用绳子绑在鲨鱼尾鳍和胸鳍后面，把绳子绑在救援船上，将鲨鱼拖出港口。
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9. The eye sac, ear vesicle, heart, digestive tract, kidney, swim bladder, pectoral and tail fin were developed preferentially.
在整个发育过程中，眼、耳囊、心脏、消化道、肾脏、鳔、胸鳍和尾鳍等得到了优先发育。
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10. The eye sac, ear vesicle, heart, digestive tract, kidney, swim bladder, pectoral and tail fin were developed preferentially.
在整个发育过程中，眼、耳囊、心脏、消化道、肾脏、鳔、胸鳍和尾鳍等得到了优先发育。
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用作名词 (n.)
Winglike pectoral fins extend along the sides of the head. 翼状的胸鳍沿头的两侧延伸生长。
Oddly enough, this ventilation shift may have kicked off the gradual morphing of the shoulder girdle and pectoral fins. 奇怪的是，这呼吸上的改变有可能启动了前肢带与胸鳍的形态逐渐改变。
