爱惜精神以备日后担当大任,虚度时光何以报父母之恩?
The temporary can become permanent if it serves people well.
I don't let the world dull my sparkle.
The safest way to double your money is to fold it over once and put it in your pocket.
激光对于阿秒物理学的意义,就像望远镜对于天文学的意义一样。