三角形是基本的绘图操作，在此基础上可建立更为抽象的操作。
A triangle is a basic drawing operation on which you can build more abstract operations.
这是更高层次的抽象，更为重要的。
The higher the level of abstraction, the more important this is.
这也正好说明了这样一条原则：好的抽象能够让任何事物更为有用。
This perfectly illustrates the principle that good abstractions make everything more usable.
这也正好说明了这样一条原则：好的抽象能够让任何事物更为有用。
This perfectly illustrates the principle that good abstractions make everything more usable.
应用推荐