A good abstraction is one that emphasizes the important details and suppresses the unimportant ones.
一个好的抽象是强调重要细节并抑制不重要细节的抽象。
内外之间的边界不是一条线，而是一个渐变。
外交家的任务是为国家争取最大的利益，同时避免不必要的冲突和摩擦。
The most prominent single element in modern scientific management is the task idea. The work of every workman is fully planned out by the management at least one day in advance, and each man receives in most cases complete written instructions, describing in detail the task which he is to accomplish.
创新是进步的关键。