Change is hardest at the beginning, messiest in the middle, and best at the end.
让我们尝试教导慷慨和利他主义,因为我们天生自私。
对企业的控制包括确保一切按照已采纳的计划、已下达的命令和已制定的原则进行。
The most important thing in mathematics is to ask the right questions.