l抽样调查：定期对员工的工作进行抽样调查，确保符合你的标准。
Sampling: Periodically review samples of your employees' work and check to make sure that it meets the standards you agreed to.
方法全国系统抽样调查省市县各级疾病预防控制机构的各类设备配置种类和数量，计算设备资产，和标准比较得到缺口。
Method National system sampling survey of kinds and number of the equipment in institution of disease prevention and controlment, compute equipment assets, and gaps compare with standard.
方法按照第二次全国口腔健康流行病学调查标准，对两镇3 ~ 74岁人群进行龋病流行病学抽样调查。
Methods According to the standard of the second national oral health epidemiological investigation, the incidence of caries in 3 ~ 74-year-old residents of the two town were examined.
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