四、Implementation: The Building Blocks 实现：构件

This is the essential part of this guide. We will introduce and explain some explicit rules with examples. You can follow these rules and apply in your solution while implementing the Domain Driven Design.

这是本指南的关键部分。我们将用例子介绍和解释一些明确的规则。在实现领域驱动设计时，你可以遵循这些规则并应用于你的解决方案。