世界上充满了门，每一扇门都是一个选择。

求和者就是希望鳄鱼最后一个吃自己的人。

The concept of nondeterminism in computation is one of the most important ideas in computer science.

I am convinced that the substitution of a simple tax on the rent of land for the complicated taxes which at present oppress industry would be advantageous to all classes.

文学是社会自我审视和认识的镜子。