Please explain “panic button” in this: America’s bull market may end soon, but it’s not time to hit the panic button yet. My comments: First of all, in stock market terminology, bull market means ...

世界第二次大战期间，美国轰炸机的驾驶员在飞机受损的紧急情况时按动紧急按钮(panic button)通知机上人员降落。后来口语中有hit（或者push）the panic button表示惊惶失措，说一个人遇到紧急或者非常情况时手忙脚乱，不知所措，有如机师乱按紧急按钮，生动地托出 ...