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.
Don't feel stupid if you don't like what everyone else pretends to love.
出自《抱朴子·行品卷》。有强劲的胆略，和坚定的信念，便可以毫无畏惧。怀有正义，便能够为了正义视死如归。
Sustainable agriculture is not a slogan but a responsibility—we must preserve green mountains and clear waters for future generations.
The beauty of cinema is that it allows us to see the world through someone else's eyes.