The only service a friend can really render is to keep up your courage by holding up to you a mirror in which you can see a noble image of yourself.

莫迪利亚尼-米勒定理的核心思想是，在某些条件下，公司的价值不受其融资方式的影响。

Problem solving is the central activity of intelligent systems.

The future of agriculture lies in the integration of traditional knowledge with cutting-edge biotechnology.

A building must be a reflection of the society it serves.