This article builds upon the design principles and code outlined in the first article of this series.

本文构建于本系列 第一篇 文章中描述的设计原则和代码的基础之上。

youdao

Tests are different kinds of code, but good (albeit different) principles apply to them as well.

测试也是代码，良好的原则也适用于测试(尽管原则有所差异)。

youdao

Design principles: Validates that your code adheres to the design principles of object-oriented programming.

设计原则：验证你的代码是否坚持面向对象编程的设计原则。

youdao