In a purely biological sense, fear begins with the body's system for reacting to things that can harm us—the so-called fight-or-flight response.
从纯粹的生物学意义上讲，恐惧始于身体系统对可能会伤害我们的事情的反应，也就是所谓的“战或逃反应”。
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People whose levels of happiness and meaning line up, and people who have a strong sense of meaning but are not necessarily happy, showed a deactivation of the adversity stress response.