Once the monitoring application attempts another select or blocking read , those calls will return immediately since there is unread event occurrence data waiting in the buffer.

当监视应用程序试图执行另一次select或阻塞的read调用时，这些调用会立即返回，因为缓冲区中有未读的事件发生数据。

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The ideal number is one per processor, but that implies that none of these threads should execute a blocking operation such as a synchronous read/write or a wait on an event.

理想的情况是，线程数量等于处理器的数量，不过这也要求任何线程都不应该执行诸如同步读写、等待事件通知等阻塞型的操作，以免线程阻塞。

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The asynchronous I/O allows applications to read and write data without blocking.

异步 I/O 让应用程序能够在不阻塞的情况下读写数据。

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