OOP & SOLID
Implementing DDD highly relies on the Object Oriented Programming (OOP) and SOLID principles. Actually, it implements and extends these principles. So, a good understanding of OOP & SOLID helps you a lot while truly implementing the DDD.
实现DDD高度依赖于面向对象的编程（OOP）和SOLID原则。实际上，它实现并扩展了这些原则。因此，在真正实现DDD时，对OOP和SOLID的良好理解会对你帮助很大。