Happiness is the key to life. Without happiness, you have nothing.
The P versus NP problem is one of the most important problems in computer science.
The more you like yourself, the less you are like anyone else, which makes you unique.
I always try to find a way to win even when I'm not playing my best.
环保是我们不可推卸的责任,在开采过程中必须注重生态保护,实现可持续发展。
妈妈必须同时喂养孩子的身体和精神,且精神上的需求更重于身体的需要。