The best way to learn mathematics is to do mathematics.
学习数学的最好方法就是去做数学。
The future of a nation depends on today's education.
Success is nothing without someone you love to share it with.
If we men married the women we deserved, we should have a very bad time of it.
The mind is a set of information-processing machines that were designed by natural selection to solve adaptive problems faced by our hunter-gatherer ancestors.