Keep all your things visible in a hotel room， not in drawers， and all gathered into one spot. That way you’ll never leave anything behind. If you need to have something like a charger off to the side， place a couple of other large items next to it， because you are less likely to leave 3 items behind than just one.

Our greatest ability as humans is not to change the world, but to change ourselves.

We were both young when I first saw youI close my eyes and the flashback starts?I'm standing there on a balcony in summer air?See the lights， see the party， the ball gowns?

未来是让不可能变为可能。

一个好的数学家是懒惰的，但要以建设性的方式。

质量不是理论；它是一种实践。