Wait on event occurrences with the select() (or a blocking read()) system call.
使用select()（或阻塞的read()）系统调用等待事件发生。
If desired, wait for further event occurrences.
如果需要，继续等待事件发生。
You should not wait until the Deactivated event occurs to store this data.
你不应该等到存储这些数据发生失活的事件。
You should not wait until the Deactivated event occurs to store this data.
你不应该等到存储这些数据发生失活的事件。
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