If it's set to 1, you know the request was made using an asynchronous Ajax call, and you should just send back a message with OK or an error.

如果该字段设置为1，则表明请求是通过使用一个异步ajax调用发出的，您应该只返回一条包含OK或一个错误的消息。

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In the case of interruptible flows, you can handle the two-way asynchronous services by using an Invoke activity to send the request and a receive activity to receive the reply.

在可中断流情况下，通过使用Invoke活动发送请求，并使用Receive活动接收应答，从而实现双向异步服务。

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Ajax developers can send asynchronous requests from the client at any time, so user interactions can continue while the server processes the requests. This is the flow of an Ajax request.

Ajax开发人员可以在任何时刻从客户机发送异步请求，因而在服务器处理这些请求时，用户交互可以继续进行。

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