落在一个标准偏差之外的概率是1/3,两个标准差之外的概率是1/20,三个标准差之外是百分之一
One standard deviation happens one draw out of three, two standard deviations one out of twenty, three standard deviations is one out of one hundred.
附加的标准偏差可能在分析结果中带来更高的百分比或者置信度。
Additional standard deviations can give you a higher percentage or confidence in the results of your analysis. A few of these confidence intervals are as follows.
但是，因为现实生活中就是有一些偏差的，因此如果你想要一个真实效果的照片，你可以不必花太多精力去将它改成百分之百正确的，有一些小问题是很正常的。
But, as in real life there is some deviation so if you want a photo real result you should not pay too much attention to get it completely correct its okay with some small errors.
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