片语
population sampling investigation人口抽样调查
sampling investigation of labor force劳动力抽样调查
double sampling serum investigation双份血清调查
systematic sampling investigation整群抽样调查
sampling g investigation抽样调查
sampling survey抽样调查;样本甸
random sampling investigation随机抽样调查
national sampling investigation全国抽样调查
statistical sampling investigation method统计抽样调查法
method of sampling investigation抽样调查法