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.
剧院是当下时刻的艺术，时间在那里静止。
The opinions of the wise are alike, but fools have their own way.
你自己，就像整个宇宙中的任何人一样，值得你的爱和关怀。
If something is too hard, we move on to something else.What could be more simpler than that?