biological altruism

• 生物利他性

biological altruism的用法和样例：

例句

1. Financial status bears little on altruism or empathy.
   经济状况对利他性和同情心的影响微乎其微。
2. Altruism runs higher among older people and those with college educations.
   利他性在年长的人群和大学学历人群中较强。