Condition effect is an important source of non-sampling error in continuous surveys with matchedsamples.
条件的影响是有匹配样本的连续调查特有的计量误差来源。
2
U. S. health officials said Friday that some cases of the virus in the United States matchedsamples of the deadly Mexican virus.
美国卫生官员说，在美国有部分病毒样本和致命的墨西哥猪流感相匹配的病例。
3
In this study, the authors analyzed a database of ultrasound-guided liver biopsies performed from 1995 to 2008, and identified 255 breast cancer patients with matched primary and liver tissue samples.