... sample survey 抽样调查 sample area survey 样地调查 sample field survey 抽样现场调查 ...
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small area sample survey 小区域抽样调查
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We used the method of investigating the sample and the general survey to investigate and study the plant resources in area of six counties and two districts under Shangqiu's jurisdiction.
采取样方调查结合普查的方法，对商丘市辖区内六县、两区、一市的植物资源进行了调查。
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