You have to have confidence in your ability, and then be tough enough to follow through.
文学的美在于它让我们在一生中活出千种人生。
专制制度就像地狱一样,并不容易战胜,但我们可以安慰的是:斗争越艰巨,胜利将越光荣。
然后我有了信仰,然后我有了想象,我被他们对嘲笑的沉迷所感染,然后我看见刚果河从黑土地上蜿蜒流过,在森林中划下一道金色的沟壑。
The concept of NP-completeness has provided a powerful tool for understanding the complexity of problems.