Giving up smoking is the easiest thing in the world. I know because I’ve done it thousands of times.
经济学家正确地预测了过去五次衰退中的九次。
You can't just sit there and wait for people to give you that golden dream. You've got to get out there and make it happen for yourself.
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.