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