经济周期并不像曾经认为的那样仅仅是围绕稳定趋势的波动，而是反映了经济中更深层次的结构性变化。

昨天我是一只狗……今天我是一只狗……明天我可能还是一只狗……唉！这进步的希望真是小啊！

The study of the mind is the study of life's coping mechanisms.

"If you think you’re going to crash, step on the pedal harder."

To every action there is always opposed an equal reaction； or， the mutual actions of two bodies upon each other are always equal， and directed to contrary parts.

游览过五岳之后，其他的山就没什么可看的了；而游览过黄山之后，连五岳也没什么可看的了