—— 请按键盘 空白键 开始游戏 ——

You put together two people who have not been put together before; and sometimes the world is changed, sometimes not. They may crash and burn, or they may set off a spark that will light the world.
Economics is ultimately about improving human welfare.
The heart of a poet is a mirror that reflects the beauty and the pain of the world.
学习计量经济学的最佳方法是通过实践——处理真实的数据和真实的问题。
语言中最具破坏性的一句话是:“我们一直都是这样做的。”