Part of the investigation may involve retesting of a portion of the original sample. 调查部分工作包括最初检验样品的再检验。
It should never be assumed that the reason for an outlier is error in the testing procedure, rather than inherent variability in the sample being tested. 决不能将出现逸出值的原因假定为检验操作的错误，而不认为被检验样品存在固有的差异。
