—— 请按键盘 空白键 开始游戏 ——

两个物体的相互作用力总是大小相等,方向相反,同时出现或消失且作用于同一直线上。
The best way to learn econometrics is by doing—working with real data and real problems.
I like crossing the imaginary boundaries people set up between different fields—it's very refreshing.
多元化投资可以降低风险,但也要注意不要过度分散。
Music is my wings, letting me fly.
每部电影都是一次旅程,每次旅程都是一部电影。