| 单词 | 直接祖先 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔prehominid〕Any of several extinct primates regarded as an immediate ancestor of the hominids.猿人：被认为是人类直接祖先的一种已灭绝的灵长目动物美国传统〔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美国传统 |
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