When the user submits input on the web page (Figure 34), this allocates a connection from the connection pool and drives the IO, which in turn drives the macro and the host application.

当用户在网络页面上提交输入（图 34）时，它会从联系汇处分配一个联系，并驱动 IO，这又反过来驱动宏以及主机程序。

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The IO then passes the extracted output back to the user's mobile web browser, and the connection is returned to the connection pool to wait for another input request.

IO然后将提取的输出返回至用户的移动网络浏览器，而连接会返回至连接汇处，等待另一个输入请求。

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Tomcat uses NIO (Non-blocking IO) to keep the connection alive without wasting the waiting threads.

Tomcat 使用 NIO（无阻塞 IO）来保持连接活动，无需浪费等待中的线程。

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