The Linux sleep function is similar to Sleep, but the time periods are measured in seconds.
Linuxsleep函数类似于 Sleep，但是时间段以秒来计。
Rather than continuously checking to see if my queue has a message, I provide a sleep function that waits 30 seconds in the event that no message was retrieved.
我没有不断检查看我的队列是否有消息，我提供了一个休眠函数，如没有检索到消息就等待30秒。
A sleep function allows the drives to be cycled off when the system demand drops below a preset level, and restarted automatically when the demand increases.
睡眠功能允许驱动在系统需求降到一个预设级别之下的时候就停止运行，而当需求增加的时候又自动重新启动。
Anxiety symptoms such as insomnia constantly trouble modern people's normal life, so research on the plants which have improving sleep function is increasingly urgent.
焦虑、失眠等症状不断困扰着现代人的正常生活，对于具有改善睡眠功能的植物的研究开发日益迫切。
Anxiety symptoms such as insomnia constantly trouble modern people's normal life, so research on the plants which have improving sleep function is increasingly urgent.
焦虑、失眠等症状不断困扰着现代人的正常生活，对于具有改善睡眠功能的植物的研究开发日益迫切。
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