A selector is a dispatch pattern you use to dynamically determine which implementation of a component to invoke at runtime.

选择器是一种分派模式，用于动态确定在运行时调用哪一个组件的实现。

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The descriptor points to the implementation of the component, in this case a class file, and also includes any configuration information that the component needs.

描述符指向组件的实现，在这种情况下是一个类文件，还包含组件需要的任何配置信息。

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Also included were recommendations for the implementation of a business component and sample code to further illustrate how an implementation might look.

本文还介绍业务组件和样例代码实现的一些建议，进一步说明了一个实现的样子。

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So it is unfortunate that Republicans, I guess, as you cited, have continued their efforts to oppose this bureau, oppose the implementation of a key component of the Wall Street reform law.

WHITEHOUSE: Press Briefing

Training in and implementation of patient safety protocols is an important component of any dental school education.

CNN: Don't be afraid of dentists