In the thread-per-request model ( Continuations in Figure 2 ) a thread is used to serve the arrived request and the connection is handled through an NIO selector .

在每个请求一个线程模型下（图2的续图），要使用一个 线程为到达的请求提供服务，而连接是通过NIO 选择器进行处理的。

It is actually possible to handle many thousands of clients with a single thread using the NIO selector event-driven approach although we 'll see later that threads still have a role to play .

使用NIO 选择器事件驱动方法，实际上可以用单个 线程处理成千上万的客户机，不过，我们还会在后面看到线程仍有一个角色要扮演。