最终，我们记住的不是敌人的话语，而是朋友的沉默。
In the end, we will remember not the words of our enemies, but the silence of our friends.
In mathematics, truth is always relative to the system you're working in.
有时我们测量事物，看到它们在短期内实际上会损害销售，我们仍然会这样做。