数学的研究对科学的发展就像空气或水一样。
The tragedy of great power politics is that even well-intentioned states are forced to act in ways that can lead to conflict and war.
避免痛苦的唯一方法就是不要有足够的闲暇去思考你是否快乐。
Survival can be summed up in three words – never give up. That’s the heart of it really. Just keep trying.