At last, discuss the problem of the study method for disaster.

最后，对此类灾害研究方法存在的问题进行了讨论。

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The mainly problem of the study on the evaluation of human capital by the evaluation method of the compound real option is the experience study.

开展人力资本复合实物期权评价方法研究的主要困难在于缺乏必要的实证分析支撑环境。

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Almost seventy percent of the workers in the study had a new or worsened breathing problem.

在这项研究中，近70%的工作人员有新的或恶化的呼吸问题。

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A newly reported British study suggests that taking another drug with a small amount of aspirin may help solve the problem.

VOA: special.2009.10.20

Second, by including the entire eligible Danish population, which is covered by a national tumor registry, the study avoids the problem of selection bias (that is, people who do not make it into your study for various reasons, including refusal).

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To give you an idea of how widespread the problem is, a new study to be published in the Journal of Finance and Quantitative Analysis finds that option volume in a specific stock begins to surge three days before unannounced analyst upgrades or downgrades of a company.

WSJ: Insider Trading's Smart Cheats

To get around this potential problem, the University of Pennsylvania study only examined studies without a washout period.

FORBES: Health Care