The only way to understand another culture is to assume the frame of reference of that culture.
數(shù)學(xué)中最重要的是理解概念，而不僅僅是記憶公式。
一件事不一定是真的或假的；它可能既是真的又是假的。
你越努力，就越幸運(yùn)。
Quality is not a function; it is a discipline.