Many experts think the common ancestor lived at least 7 million years ago.
许多专家认为这个共同的祖先至少在700万年前就存在了。
King said the research supported the idea that the role of social bonds for primates goes back millions of years, to at least the common ancestor of baboons and humans.
金表示，这项研究证明了社会关系在灵长类动物群落中的作用可以追溯到几百万年前，至少可以追溯到狒狒和人类的共同祖先。
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