英语词汇“pectoral fin”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

pectoral fin

noun Zoology

Each of a pair of fins situated on either side just behind a fish’s head, helping to control the direction of movement during locomotion. They correspond to the forelimbs of other vertebrates.Paired pectoral fins and a dorsal fin were present, and the caudal fin was asymmetrical with a large upper lobe....

One of the fossil's most intriguing aspects is the large, paired spines on the shark's pectoral fins, the side fins used for steering.
Look at the shape and size of the dorsal fin, pectoral fins, and the caudal fin.

单词	pectoral fin
释义	pectoral fin noun Zoology Each of a pair of fins situated on either side just behind a fish’s head, helping to control the direction of movement during locomotion. They correspond to the forelimbs of other vertebrates.Paired pectoral fins and a dorsal fin were present, and the caudal fin was asymmetrical with a large upper lobe.... One of the fossil's most intriguing aspects is the large, paired spines on the shark's pectoral fins, the side fins used for steering. Look at the shape and size of the dorsal fin, pectoral fins, and the caudal fin.
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