| 单词 | 腔棘鱼 |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔living fossil〕The coelocanth is a living fossil that has existed for hundreds of millions of years.腔棘鱼是已存在好几亿年的活化石。朗文当代〔lobefin〕Any of various mostly extinct bony fishes of the subclass Crossopterygii, of which the coelacanth is a living representative.总鳍鱼：内鼻孔亚纲的各种大多已灭绝了的硬骨鱼，腔棘鱼为其现存种类代表美国传统 |
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