在北卡州德奈姆市杜克大学的研究人员为了了解像加法这样的能力进化了多少，他们关注了和人类有点远亲关系的--猕猴。
To see how far back more advanced capabilities such as addition might go, researchers at Duke University in Durham, N. C. , focused on somewhat distant relatives of humans—rhesus monkeys.
在北卡州德奈姆市杜克大学的研究人员为了了解像加法这样的能力进化了多少，他们关注了和人类有点远亲关系的--猕猴。
To see how far back more advanced capabilities such as addition might go, researchers at Duke University in Durham, N. C. , focused on somewhat distant relatives of humans—rhesus monkeys.
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