—— 请按键盘 空白键 开始游戏 ——

The beauty of instrumental variables is that they allow us to see the world in a new light.
每一个故事都是一段旅程,而每一段旅程都会改变旅人。
The past must be respected, but not copied.
薄:挑剔,贬低。訾:贬斥。贬低我商品的人,是想和我做生意;贬斥我品行的人,是想和我交朋友。
I think goals should never be easy, they should force you to work, even if they are uncomfortable at the time.