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

"Writing is a way to explore the unknown."

Read not to contradict and confute; nor to believe and take for granted; nor to find talk and discourse; but to weigh and consider.

你必须愿意比任何人都更努力。

环保责任对我们的行业来说不再是可选项；它是生存的基本要求。

记忆是个奇怪的东西。它不像我以为的那样运作。它不是可以重播的电影。它更像是一个你讲给自己的故事，而每次讲述这个故事都会改变。

The great powers are always searching for opportunities to gain power at the expense of their rivals, and they will use force if they believe it will bring them strategic advantage.

制造业的未来在于平衡效率与环境管理。