当你想要处理的服务的服务帐户用于其自己的资源（例如，用于管理Compute Engine资源App Engine应用程序），相对于外部用户（例如，标准的OAuth流量）的资源。使用服务帐户的应用程序将是资源的拥有者，也没有用户将不得不参与 - 他们不是用户的资源，因此他们为什么会

A Service Account is used when you have a service that wants to handle its "own" resources (e.g., an App Engine app that manages Compute Engine resources), as opposed to the resources of an external user (e.g., the standard OAuth flow). Using a Service Account the app will be the owner of the resources, and no user will have to be involved -- they're not the user's resources, so why would they be?

安装的应用程序是pretty简单 - 它是由用户安装到管理用户的资源的应用程序。如果您的应用管理用户的资源，你的将会的需要问他们的许可。还有周围没有办法。

An Installed Application is pretty straightforward -- it's an app installed by the user to manage the user's resources. If your app is managing a user's resources, you will need to ask their permission. There's no way around that.