我们将会仔细查看什么是模板，以及怎样使用它。
We'll take a closer look at what a template is and how to use this page later.
教学大纲中描述了何时以及怎样使用后面的表格。
A description of how and when the following forms are used can be found in the syllabus.
清单7告诉您怎样扩展您的服务实现类来支持生命周期管理以及怎样使用服务上下文。
Listing 7 shows you how to extend your service implementation class to support life cycle management and how to use the service context.
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