从化石记录中可以了解到一些已经灭绝、但已经完全变成海洋生物的鲸目动物。
Extinct but already fully marine cetaceans are known from the fossil record.
鲸目动物的声音运用能力甚至超过大多数灵长类动物。
根据我们所知道的情况,我猜鲸目动物文化介于人类和黑猩猩之间。
Based on what we know, I'd guess that cetacean culture is intermediate between humans and chimpanzees.
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