亲爱的，做人没有及格或不及格。

没有个人的推动，社会就会停滞。没有社会的同情，个人的推动就会消失。

The quest to unify the fundamental forces of nature is one of the greatest challenges in modern physics.

The best way to find yourself is to lose yourself in the service of others.

Every tree planted today is a promise to tomorrow.

所有行为最终都可简化为物理和化学过程。