一本实体书的最重要的特点是,当你阅读时，它会消失在你眼前。
The number one feature of a physical book is that it disappears while you are reading it.
到明年这个时候，大部分视频游戏厅、书店和玩具店——还有很多其他领域的实体商店——将会完全消失。
By this time next year, most video game stores, book stores and toy stores — as well as brick-and-mortar shops in many other categories — will simply vanish.
一些业务实体作为抽象的概念消失了，而其他的一些通过计划(schema)或者详细的设计被映射成了类。
Some business entities disappeared as abstract concepts, while others mapped to classes via the schema or detailed design.
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