All-or-none law: The rule that the size of the action potential is unaffected by increases in the intensity of stimulation beyond the threshold level.
全或无定律:刺激强度增加超过阈值时,动作电位的大小不受其影响的规律。
Altruism: Prosocial behaviors a person carries out without considering his or her own safety or interests.
利他主义:一个人不考虑自己的安全和利益而做出的亲社会行为。





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