CPU状态信息us,sy,ni,id,wa,hi,si,st含义

使用系统命令top即可看到如下类似信息：Cpu(s):0.0%us,0.5%sy,0.0%ni,99.5%id,0.0%wa,0.0%hi,0.0%si,0.0%st但不知什么

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