The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.
释义:不要争强好胜,人生百年不过是一场戏。顷刻之间锣鼓声停,不知道哪里是自己的家乡。
里氏替换原则是面向对象编程中的一个基本概念,确保派生类可以替代其基类使用,而不会改变程序的正确性。
真正的发现之旅不在于寻找新的风景,而在于拥有新的眼光。
The true value of a forest can't be measured in board feet alone.
The best way to predict the future is to invent it.