Synapsida
[si'næpsidә]
解释:
(noun.) extinct reptiles of the Permian to Jurassic considered ancestral to mammals.
整理:罗伯塔--From WordNet
[si'næpsidә]
(noun.) extinct reptiles of the Permian to Jurassic considered ancestral to mammals.
整理:罗伯塔--From WordNet