然而，案例分析法存在两大严重的缺陷，它容易受到期望效应以及非正常个体的影响。
There are two serious problems with case studies — expectancy effects and atypical individuals.
如果有一件来源清晰，并被发现它的专业考古学家用地层分析法确定年代的文物存在，谁还会去买一个毫无标志的水罐呢？
Who would want an unmarked pot when another was available whose provenance was known, and that was dated stratigraphically by the professional archaeologist who excavated?
结论潮式呼吸分析法能够准确地检测出气道阻塞的存在。
Conclusions Tidal breathing analysis was able to detect the existence of airway obstruction.
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