我们祖先面临的主要生存威胁 - 捕食者、饥饿、疾病 - 在我们的恐惧和焦虑中留下了印记。
"The major threats to survival that our ancestors faced - predators, starvation, disease - left their mark on our fears and anxieties."
谁若不能独立,谁就谈不上自由。
We are here to add what we can you to life，not to get what we can from it.
Just be yourself, there is no one better.
学习数学的唯一方法就是做数学。
The city is like a text, it speaks to those who can read it.
Don't worry about what anybody else is going to do. The best way to predict the future is to invent it.