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一、 In a purely biological sense, fear begins with the bodys system for reacting to things that can harm us -- the so-called fight-or-flight response. 从纯生物角度来说，恐惧始于人体系统对会伤害我们的事情的反应----即所谓的战斗或逃脱反应。 An animal that cant detect danger cant stay alive, says Joseph LeDoux. Like animals, humans evolved with an elaborate mechanism for about potential threats. 不能觉察到危险的动物无法生存Jeseph LeDoux。像动物一样，人类进化过程中形成了一个精巧的机制，以处理潜在威胁的信息。 At its core is a cluster of neurons deep in the brain known as the amygdala . 该机制的核心是大脑内部的一束被称为扁桃核的神经元。 LeDoux studies the way animals and humans respond to threats to understand how we form memories of significant events in our lives. Ledoux研究了动物和人类对危险的反应方式，以理解我们对于生活中重要事件是如何形成记忆的。 The amygdala receives input from many parts of the brain, including regions responsible for retrieving memories. 扁桃核从大脑的很多部位中接受输入的信息，包括负责回收记忆的部位。 Using this information, the amygdala appraises a situation - I think this charging dog wants to bite me - and triggers a response by radiating nerve signals throughout the body. | 
