| 单词 | 三迭纪 |
| 释义 | 〔thecodont〕Any of various extinct primitive archosaurs of the order Thecodontia of the late Permian and Triassic periods, having teeth in sockets and probably ancestral to the dinosaurs.槽齿类：二迭纪和三迭纪晚期槽齿目几种已灭绝的原始初龙，牙槽中有牙齿并且可能是恐龙的祖先〔therapsid〕Any of various reptiles of the order Therapsida of the Permian and Triassic periods, many of which are considered to be direct ancestors of mammals.兽孔类：二叠纪和三迭纪的兽孔类爬行动物中的一种，它们中的许多种被认为是哺乳动物的直接祖先 |
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