数学的本质在于它的自由。

胆识要大，心思要细密；智慧要圆融，行为要方正。

He said that the way of the world is to bloom and to flower and die but in the affairs of men there is no waning and the noon of his expression signals the onset of night. His spirit is exhausted at the peak of its achievement. His meridian is at once his darkening and the evening of his day.

我们相信多元化的能源未来，多种能源共同满足全球需求。

强调抓住机遇的重要性

人类最大的欺骗来自于自己的观点。

2004年9月13日，81岁的杨振宁在清华大学开始为本科生讲授普通物理。他说

I'm a musician, not a celebrity.