The essence of quantum mechanics is that it provides a mathematical framework for the description of the behavior of atomic and subatomic particles.
量子力学的本质在于它提供了一个数学框架，用于描述原子和亚原子粒子的行为。
A vida é uma festa que não se repete.
I know that I am intelligent，because I know that I know nothing.
The freedom then of man, and liberty of acting according to his own will, is grounded on his having reason, which is able to instruct him in that law he is to govern himself by, and make him know how far he is left to the freedom of his own will.
Every performance is a new challenge.
It is justice, not charity, that is wanting in the world.