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。
Have thread a wait on the event.
有螺纹的A等待事件。
Have thread a wait on the event.
有螺纹的A等待事件。
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