The short explanation for this is that the user interface provides a view of the system from the system perspective.
这种说法的一个简单解释是，用户接口提供一个系统透视图的系统概貌。
From a user interface and maintenance perspective, it's better to have a single view with a handful of sorting arrows than multiple views.
从用户界面和维护的角度来看，采用一个含少量排序箭头的视图比采用包含多个排序箭头的视图要好。
We cover this view in more detail later in the section, "NDERPws from a user perspective."
我们将在“用户视角下的NDERPws”小节中更详细地描述这个视图。
AM: Transaction tracking enables developers and testers to view the system from an end-user perspective.
AM：事务跟踪使开发人员和测试人员能够从一个终端用户的角度来观察系统。
Both of these operations act on data but neither of them add, modify, or delete data (from the perspective of the database, though a user may not share this view).
这些都是对数据的操作，既没有添加数据，也没有删除数据。
Both of these operations act on data but neither of them add, modify, or delete data (from the perspective of the database, though a user may not share this view).
这些都是对数据的操作，既没有添加数据，也没有删除数据。
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