| 单词 | the lower vertebrates |
| 释义 | the lower vertebrates zoology See full dictionary entry for lower vertebrates relatively simple and primitive vertebrates The system seemed to be a very ancient one, seen in all mammals and lower vertebratessuch as birds and reptiles. |
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英语词典包含233703条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。