年轻时你以为可以离开永不回头，但你总会回望。

The biggest challenge isn't the science - it's changing people's perceptions.

生命的意义在于活得充实，而不在于活得长久。

语言是我们改变世界最强大的武器。

人们较易于受邪恶的摆布胜于受道德的约束。

Give the pupils something to do, not something to learn; and the doing is of such a nature as to demand thinking; learning naturally results.

宇宙是能量和物质的交响曲，在最大的尺度上演奏。