Model 模型

The model subpackage defines a rich trading domain model. # 模型子包定义了一个丰富的交易领域模型。

The domain model is agnostic of any system design, seeking to represent the logic and state transitions of trading in a generic way. Many system implementations could be built around this domain model. # 领域模型与任何系统设计无关，力求以通用方式表示交易的逻辑和状态转换。许多系统实现都可以围绕这个领域模型构建。