简单是最终的复杂。

I try to approach life with an open mind and a positive attitude.

I'm more worried about being a good person than being the best football player in the world. When all this is over, what's left is what you've achieved; what kind of person you were.

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。