教育本身就是生活，而不是为生活做准备。

成功的道路总是在建设中。

A problem is in P if it can be solved quickly by a computer, and in NP if a solution can be verified quickly.

The dynamics of perception are governed by the principle of Prägnanz (good form).

Children have never been very good at listening to their elders, but they have never failed to imitate them.

技术应该解决实际问题，而不仅仅是创造新玩具。