业务项目的一些实例包括订单文档、客户地址及材料帐单。
Some examples of business items are order documents, customer address, and bills of materials.
事件是一种抽象，表示某件事情已经发生或正在发生这一事实，例如股票交易、客户订单、地址更改等等。
An event is an abstraction that represents the fact that something happened or is happening, such as a stock trade, a customer order, an address change, and so on.
顾客不仅可以购物，还可以创建账户、添加地址和访问自己的订单记录。
Not only does it let customers buy things, it lets them create an account, add addresses and access their order history.
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