In an ideal world, each functional area such as process services, would be "pure", offering only one class of services in order to provide a separation of concerns.

在理想情况下，每个功能区(如流程服务)都是“纯”功能区，为了实现关注点分离仅提供了一个服务类。

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We start with a static method (independent of the class) for setting the user's services in the cache.

首先解释用来在缓存中设置用户服务的静态方法(不依赖于类)。

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A responsibility of a class describes the services that this class will provide in our system, and that no other class will provide.

类的职责描述了这个类在系统中所提供的服务，而且其它类不会重复提供这些服务。

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All aircraft (such as from the Ecuadorian Army, Air Force, and commercial airlines) that are operated out of Eloy Alfaro benefit from world class response services in cases of accidents, fires or rescues, 24 hours a day, 365 days a year.

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Mr Thong said the aircraft were needed to help boost the airline's growth, particularly in the development of business class services with Europe.

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The proliferation of the middle class has erupted in a spree of banking services offering mobile apps and ATMs to the population.

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