translation.en: But once in a while, something very difficult is given to us, and when this difficult thing occurs to us, it's a challenge to rise to that opportunity, and we can rise to it by learning something which is sometimes painful.
translation.zh: 可是偶尔 一些非常困难的事情发生了 当这些困难出现时， 这个机遇，就是一种挑战 它会让我们学到些什么 有时是痛苦的