电报不仅是一项发明，而且是团结人类的手段。
Strategy is about making choices, trade-offs; it's about deliberately choosing to be different.
"I’m not playing for the records. I’m just trying to enjoy my tennis."
就是说做不善的事情要受到惩罚，做善事会得到奖赏。
In science, we try to explain what we don't understand. In mathematics, we try to understand what we can't explain.