... single sampling : 一次抽样，单式抽样 single random sampling : 一次随机抽样 minimax single sampling : 极小极大一次抽样 ...
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要进行一次系统随机抽样，必需知道人群中的家庭总数，平均每户家庭5岁以下儿童的个数，以及总人口。
To undertake a systematic random sampling, one needs to know the total number of households, the average number of children under 5 years of age in a household, and the total population.
该计划在美国第一次采用随机抽样的方法进行鱼体组织调查，并得到了有史以来最详尽的鱼体毒物残留数据。
It is the first national fish tissue survey to be based on a probabilistic (random) sampling design, and it will generate data on the largest set of PBT chemicals ever studied in fish.
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