breaking point
noun [ S ] uk/ˈbreɪ.kɪŋ ˌpɔɪnt/ us/ˈbreɪ.kɪŋ ˌpɔɪnt/
爆发点；失控点；极限
the stage at which your control over yourself or a situation is lost
The situation reached breaking point when his son crashed the family car. 当他儿子撞坏了家里的汽车时，事情终于暴发了。
Her nerves were at breaking point. 她的神经快要崩溃了。