... sample statistic 样本统计量 sample survey method 样本调查法 sample survey techniques 样本调查技术 样本调查技术 ...
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The application of sample survey method in history research is analyzed.
方法：对项目点北碚区进行抽样调查。
By using the method of sample survey, this paper investigated the edit situation of popup news in the three main instant messengers QQ, POPO and UC, in order to find out their character.
本文通过抽样调查的方法，对当前国内三大网络即时通讯工具(腾讯QQ、网易POPO、新浪uc)弹出式新闻的编辑状况进行比较分析，以揭示其各自的特色。
The generation and damage regulation of red turpentine beetle (Dendroctonus valens) are studied with the method of sample plot and tree-by-tree survey.
采用标准地调查和单株调查的方法，研究了红脂大小蠹的发生和危害规律。
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