For this study, the investigators gathered data from the British household Panel Survey - a yearly questionnaire of a nationally representative sample of UK households.
这个研究中数据来源于英国家庭状况调查，它是一个对有代表性的英国家庭样本的年度调查。
In this paper, the main factors affecting tunnel erosion and their mechanism were studied based on field survey and data from sample analysis.
本文以野外调查和资料分析为基础，分析研究了影响洞穴侵蚀的主要因素和机理。
By using Shanghai's data from the Second National Sample Survey on disability in 2006, the paper analyses characteristics and disability of Shanghai's old disabled people.
利用2006年上海市第二次全国残疾人抽样调查资料，分析上海市残疾老人的基本特征和致残状况。
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