这是最好的时代,这是最坏的时代。
The goal of business is not just to make money, but to make a difference.
地球上最小的少数群体是个人。那些否认个人权利的人不能声称是少数群体的捍卫者。
The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.
To teach mathematics is to inspire the next generation of thinkers and problem solvers.