The shortcomings of the present study include its retrospective methodology, small numbers, and the lack of a validated system to describe patient outcome.

本组研究病人数量少是一缺陷，而且缺乏最终结果描述。

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Causality diagram methodology can be applied in fault analysis, however lack of analysis on basic event importance.

因果图理论可以进行故障分析，但是缺乏对基本事件的重要性的分析。

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More troubling than the number of retailers or service companies is the lack of a meaningful methodology cited in the article by the Forbes reporter.

FORBES: America's 25 Most Inspiring Companies

Though efforts continue to be made for greater emissions standardization, questions remain about the validity of many of the voluntary offsets that have been purchased and sold to date in the United States due to a lack of uniformity around methodology, monitoring, and verification.

FORBES: Should Companies Outsource Carbon Reduction?

What holds archaeoseismology back from being a mature scientific discipline is its lack of a rigorous and transparent methodology.

UNESCO: Tales set in Stone: learning from ancient earthquakes