黑猩猩和海豚妈妈们远离群体打猎和收集食物，并保证他们所找到的食物都给孩子们。
By hunting or gathering away from the group, both chimpanzee and dolphin moms ensure that what they find goes to their young.
黑猩猩和海豚妈妈们远离群体打猎和收集食物，并保证他们所找到的食物都给孩子们。
By hunting or gathering away from the group, both chimpanzee and dolphin moms ensure that what they find goes to their young.
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