唯一不可能的事情是你没有尝试的事情。
The oldest, shortest words—'yes' and 'no'—are those which require the most thought.
全球经济治理的未来取决于大国之间合作与竞争的平衡。
研究成功的关键是专注于具有长期影响的基础问题。
A mathematician is a device for turning coffee into theorems.