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。
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.
心是脆弱的，但它也是我们最伟大力量的源泉。
The past is a foreign country; they do things differently there.
I don’t focus on the score, I focus on the process.
我不想成为榜样。我想成为一个真实的人。
无限小在自然中的作用是无限大的。