The world is a book, and those who do not travel read only one page.

孕育过一次邪恶的灵魂，此后便无法滋养善良。

人生短暂如梦，世事变化无常。

Research is not just about answering questions but also about asking the right ones.

创新就是做别人没做过的事情，或是别人做过没做成的事情。