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.
银河系的黑洞是我们研究极端引力的最近实验室。
我打每一分都像我的生命取决于它一样。
Science is not just about answering questions, but also about discovering new questions to ask.
The goal of mathematics is to understand the structures that underlie the phenomena we observe.