Reptiles and birds have a little bit about it--of it— and primates have a lot and humans have a real lot.
爬行类和鸟类只有很少的心理活动,灵长类有很多,而人类的心理活动就非常多了
For birds and mammals, we don't have many kids but so we devote a huge amount of psychological energy to protecting the ones that we have.
鸟类和哺乳类,没有很多孩子,所以我们用大量的心力,去保护我们有的孩子。
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