If so, then from an evolutionary standpoint any kindness towards an animal that an animal shows towards another animal--is a mystery.

如果这样，从进化论观点看,任何对动物善意行为,一个动物对另一个动物，是个谜团。

耶鲁公开课 - 心理学导论课程节选

Remember behaviorists were entirely comfortable studying animals and drawing extrapolations to other animals and to humans.

大家都还记得，行为主义者研究动物,然后去推断其他动物以及人类。

耶鲁公开课 - 心理学导论课程节选