在许多情况下，您希望能够方便地切换被调用的服务端点；其中一种情况是从开发环境转移到测试环境。

There are many situations in which you want to be able to easily switch the endpoint of the service being called; one is as you move from a development environment to a test environment.

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在一个中央位置有一箱常用的急救耗材不仅使您操作起来方便，更会节省紧急情况下的宝贵的时间。

Having a box of commonly used supplies in a central location not only makes it easier for you as an owner, but also might save valuable seconds that mean everything during an emergency.

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