做好准备。当你完成任何大型项目（房子、电影、活动、App）的90%时，其余无数的细节将需要第二个90%来完成。
Be prepared: When you are 90% done any large project (a house， a film， an event， an app) the rest of the myriad details will take a second 90% to complete.
The feminist movement has led women to believe that they can have it all—career, family, and personal fulfillment. But the reality is that something has to give.
La verdadera ciencia enseña, sobre todo, a dudar y a ser ignorante.
We don't inherit forests from our ancestors, we borrow them from our children.
数学是理性的音乐。