Also in the front tier is the user interface component.

在前端这一层还有用户界面组件。

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Testing a user interface component requires execution of the unit, data entry, and evaluation of the results.

测试一个用户界面组件需要进行单元执行、数据输入和结果评估。

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Alternatively, the application can provide a user interface component to collect the user's preferred language, and locale information can be fetched from there directly.

另一种办法是，应用程序可以提供一个用户界面组件来收集用户偏爱的语言，还可以从这个组件直接获取语言环境信息。

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