If so, the client and service could exchange subclasses of Order containing subclasses of Item.

如果是这样，客户端和服务就可以交换包含ite m子类订单的子类。

youdao

If so, the client and service could exchange subclasses of Order containing subclasses of Item.

如果是这样，客户端和服务就可以交换包含ite m子类订单的子类。

youdao