科学家不是给出正确答案的人，而是提出正确问题的人。

The anarchic nature of the international system means that states must rely on self-help to ensure their survival.

To write is to leave a mark, to say: I was here, I existed.

"The future is about making technology work for people."

可持续性不是一种趋势，而是我们共同的责任。