For this application scenario, you can start by designing a Preferences class for all types of users.
对于这个应用程序场景，可以从设计一个针对所有用户类型的Preference s类开始。
Even for developers who do not take an aspect-oriented approach, the multidimensional view of metadata is a valuable conceptual aid in designing annotation types.
即使对于不使用面向方面方法的开发人员，从多维的角度看待元数据对设计注释类型也会提供概念上的帮助。
Engineers working on other advances are designing and experimenting with new types of metal hands and fingers, giving robots a sense of touch.
在其他方面取得进展的工程技术人员正在设计和试验新型金属手臂和手指，使机器人具有触觉。
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