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.
The real problem is not whether machines think but whether men do.
道德的营养不良和精神的中毒对人的心灵的危害，正如身体的营养不良对于身体健康的危害一样。
创新是一段旅程，而非单一事件。
Ignorance is not innocence but sin.
The opera is a beautiful and irrational world. One could spend a lifetime listening and still not understand everything.
