translation.en: Well, if you look in textbooks today that deal with human evolution, you very often find people speculating about how early humans may have behaved, based on the behavior of chimpanzees.
translation.zh: 噢，如果你看一下现在讲人类进化的书 就会常常发现，人们是基于黑猩猩的行为表现 来思考早期人类可能的行为方式