数学中最重要的是理解概念,而不仅仅是记忆公式。
The most important thing in mathematics is to understand the concepts, not just to memorize the formulas.
亲戚都不归附,也就不要对外办交际。 
语言的美在于它能够传达无法表达的东西。
Success is a lousy teacher. It seduces smart people into thinking they can't lose.