设计良好的存款保险制度可以防止银行挤兑，同时不会造成过度的道德风险。

A proof is a device for convincing someone else that a mathematical statement is true.

自由政府的本质在于对竞争的有效控制。

The child is not a passive recipient of knowledge but an active participant in the learning process.

"Real recognize real."

心理治疗的目的是使人获得自由。