问题描述：
英语翻译
The z-score of a value tells how many standard deviations the value is from the mean.
这里的from表示什么意思,还有整句话翻译一下
If we average the total displacements of all the particles from their staring points,the result will not increase in direct proportion to time.If however,we average the squares of the total displacements of all the particles,this result will increase in direct proportion to time.
翻译,不要谷歌有道金山翻译
The z-score of a value tells how many standard deviations the value is from the mean.
这里的from表示什么意思,还有整句话翻译一下
If we average the total displacements of all the particles from their staring points,the result will not increase in direct proportion to time.If however,we average the squares of the total displacements of all the particles,this result will increase in direct proportion to time.
翻译,不要谷歌有道金山翻译
问题解答：
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