The business class section is upstairs and the economy class is right on this floor.
商务舱在楼上，经济舱就在这一层。
Welcome aboard our plane. The business class section is upstairs and the economy class is right on this floor.
欢迎乘坐我们的飞机。商务舱在楼上，经济舱就在这一层。
Based on the tuning of business rules and design in Section 4.1 you come up with a class diagram for your domain objects represented by the POJO. Our recommendations are.
基于4.1节中对业务规则和设计的调优，你得到了一个用POJO来表示的领域对象的类图。
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