理论计算机科学是一个领域，其中深刻的数学见解导致了实用的计算工具。

Quality is remembered long after price is forgotten.

我不是那种会让对时刻的爱减少的人。

The merit of Marx is that he suddenly produces a qualitative change in the history of social thought. He interprets history, understands its dynamic, predicts the future, but in addition to predicting it, he expresses a revolutionary concept: the world must not only be interpreted, it must be transformed.