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.
今天我们播下的每一粒种子都蕴含着改变未来粮食体系的潜力。
海洋赋予我们生命，我们有责任通过保护它来回报。
The only thing that can make you happy is doing what you love.