The topcompartment (with gray color) indicates the DataObject instance name and its real type; the bottom compartment indicates the contained properties.
顶部间隔（灰色）指示 DataObject 实例名称及其实际类型；底部间隔指示所包含的属性。
2
In addition to the completely foam padded bottom compartment, the pack has a large topcompartment perfect for personal items, such as a lunch or light jacket.
除了完全海绵垫底部隔层，包内还有很大顶仓可放置个人物品如午餐或轻便夹克。
3
The notation of an instance is the same as a class, but instead of the topcompartment merely having the class's name, the name is an underlined concatenation of