查询词典 stratified sampling

Methods Stratified random cluster sampling was applied to conduct the investigation and filter blood spot was collected and examined.

方法采用分层随机整群抽样，开展居民个案调查，同时采集滤纸血滴。

Methods To adopt multiple phase,stratified random sampling and questionnaire survey,857 donators involved.

采用分层随机抽样的方法，对前来献血的857名献血者进行调查，并对知情人进行访谈。

METHOD:Stratified randomized sampling method was conducted questionnaire investigation among 668 infant fosterers in Wuyuan and Shanggao County.

采取多阶段分层整群随机抽样，对江西省婺源县、上高县668名婴儿抚养者育儿知识进行问卷调查。

Methods With multi-stage stratified random cluster sampling, 3835 persons were selected for observation from 145 608 coal mine employees on the list.

采取多阶段分层随机整群抽样方法从某煤矿集团145608名在册员工中抽取3835人为观察对象，进行问卷调查，现场测量血压、身高、体重、腰围及检验血糖、血脂。

Physical activity is a well-recognized component of healthy lifestyles. Physical inactivity is a major risk factor for several chronic diseases. Although the benefits of regular physical activity on health have been well-demonstrated, the prevalence of physical inactive is still high in Taiwan. This study was designed to investigate the possible determinants of exercise participation. A stratified random sampling was applied to recruit subjects from seven districts in Tainan City.

体能活动是健康生活型态中很重要的一环，体能活动不足是许多慢性疾病的主要危险因子，虽然规律体能活动对健康的益处在近年来已经被国内外许多研究所证实，但国人没有运动习惯的比例仍然偏高，而本研究的目的是要了解影响民众从事运动行为的影响因子。

Methods By method of stratified random cluster sampling, a total of 1822 children and adolescents of Tibetan, hang and Han nationalities were recruited in A-ba area in Sichuan. Their finds height, sitting- height, knee-height and forearm length were measured. Growth and development of bone were analyzed.

采用分层随机整群抽样的方法，测量四川省阿坝州7~18岁藏、汉、羌族1822名男女儿童少年的身高、坐高、前臂长和膝高4项指标，并对其骨骼生长发育状况进行比较分析。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！