有一种想法是这样的，既然许多植物毒素都是辣的，辣味刺激会引发争斗或逃跑反应。
The thought was that since many plant poisons are bitter, the bitter stimuli would engender a fight or flight response.
对于大多数动物而言，一个严重威胁会引发一场战斗或逃跑反应，但是一旦危险过去，大脑就会停止发出威胁信号，他们也就返回到休息状态。
In most animals, a serious threat causes a fight-or-flight reaction, but once the danger has passed, the brain circuitry stops flaring and they return to a state of rest.
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