This is like the Archaeopteryx of primate evolution.
有点像最早开始进化的始祖鸟。
However the study of archaeopteryx has never stopped.
但是，关于始祖鸟的研究，却一直源源不断。
Moreover, its bone structure was similar to that of Archaeopteryx.
而且，恐爪龙的骨骼结构与始祖鸟很相似。
Moreover, its bone structure was similar to that of Archaeopteryx.
而且，恐爪龙的骨骼结构与始祖鸟很相似。
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