在出现了应用程序或后端故障时，是否能够快速恢复运行？
Could you be back up and running quickly after experiencing an application or backend failure?
后端就位并准备好存储消息后，您需要一个播音程序。
With the back end in place and ready to store messages, you need an announcer.
到目前为止，本文已经介绍了如何构建应用程序的后端。
So far, this article has described how to build the back end of your application.
用简单的HTML表单和php后端开发了一个应用程序。
Developed an application with a simple HTML form and a PHP back end.
这种后端可以轻松连接到任意纯客户端应用程序。
This kind of back end can be easily hooked up to any pure client-side application.
每个后端系统或者业务应用程序都需要一个特定的适配器。
Each back-end system or business application requires a specific adapter.
应用程序需要能够从后端数据库读写数据。
The application needed the ability to read and write data from a back-end database.
先编写后端，然后再来创建应用程序的前端。
You'll first write the back end, then work forward to build the front end of the application.
需要使用一种关系数据库作为Web应用程序的后端。
A relational database back end for a Web application is a given.
需要使用一种关系数据库作为Web应用程序的后端。
A relational database back end for a Web application is a given.
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