To improve transparency we introduced the notion of service component types, each suited for a developer with a given set of skills, performing a specific task, and using a certain tool.

为了提高透明度，我们引入了服务组件类型的概念，每种类型都适合于具有特定技能、执行特定任务和使用特定工具的开发人员。

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As great as the ExecutorService interface is, certain tasks need to be done in a scheduled fashion, such as executing a given task at determined intervals or at a specific time.

尽管ExecutorService接口非常有用，但某些任务仍需要以计划方式执行，比如以确定的时间间隔或在特定时间执行给定的任务。

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