According to Dr. Joseph Hulihan of Temple University, ice cream pain, also known as "brain freeze", is the most common form of head pain, occurring in one third of a randomly selected population.
根据Temple大学的Joseph Hulihan教授所说，冰淇淋所引致的疼痛也即“脑袋结冰”是头痛所形成的最普遍的形式，它的发病率大约占随机抽的人口里面的1/3。
Control villages resembling project villages in terms of population size were randomly selected from an area enclosed by two ellipses centred around, but not including, the project area.
从由两个椭圆围绕封闭而成的区域中随机抽取与项目村庄拥有类似人口规模的对照村庄，但不包括项目区域。
Results may not be representative of the population because of small Numbers of people, who are not likely to be randomly selected.
其结果有可能不能代表要调查人口，因为讨论参与者人数较少，而且他们可能不是随机选出来的。
Design, Setting, and Participants: Longitudinal study of 698 community-living persons 65 years or older who were randomly selected from a population registry in Tuscany, Italy.
实验设计，安排及参与者：随机选取意大利托斯卡纳社区的698名年龄在65岁以上的老人进行纵向研究。
Finally, the patient population selected may not have been optimal for a trial of botulinum toxin for chronic tension-type headache.
最后，选择的人可能不是作为肉毒素治疗的最佳慢性紧张型头痛的患者。
Conclusion: the repeated blood donors, students and active armies were low risk blood donor population. They should be selected as the major objects for safe transfusion.
结论多次献血者或学生、现役军人是安全输血的低危人群，应作为主要选择对象。
Worldwide population trends of increasing life expectancy and increasing prevalence of selected risk factors for atrial fibrillation portend a worsening epidemic.
世界范围内人们对于预期寿命的延长趋势也增加了对于房颤有选择性潜在危险因素的流行恶化。
Your test player population is not going to be random sample. It will be a self-selected sample whose average motivations and behavior will be biased.
你的测试玩家人口不是随机样本，而是特定的样本拥有相同的动机和行为也会产生偏向。
The same basic population C0 had been selected for four cycles with Dominant male sterile wheat by means of the half-sib mating recurrent selection and the mass recurrent selection programmes.
以显性雄性不育小麦为材料，采用改良半姊妹和混合轮回选择两种方案，对同一基础群体C_0进行了四轮选择。
The clouds on this page were selected by a committee of classifiers, with input from the wider classifier population.
这页上的云图像是由云形状分级器的委员会选择的，此委员会也有接受云形状分级器大众的意见。
Finally, the comparison of the statistical population density and the actual population density of the selected sample counties proves the higher precision of the results.
最后选取某些样本县，在样本县内对比每个乡镇图上的人口与实际统计人口，结果表明该人口分布数据有较高的精度。
Clearly, a sample of Chinese interviewed in a locality or localities selected for convenience does not reliably represent a larger population of interest.
显然，出于方便而选择的一个或几个地区内的被访问的中国人样本，不能可靠地代表研究者感兴趣的更大的总体。
A small group selected from a wider population to find out how they feel about a company's current products and strategy.
选自较大范围的一个小规模组，确定他们对公司目前产品和策略的看法。
Methods The patients and high-risk population of hypertension were selected according to the health records of community residents and the results of health examinations in schools.
方法在社区《居民健康档案》和学校体检的基础上，筛查出高血压患者和高危人员；
A kind of sample in which every member of the population has an equal or known chance of being selected into the sample.
一种抽样方法。人口中的每个人都有平等的被抽取的机会。也称随机抽样。
But only about half of the Legislative Council's seats are elected by the general population, with the rest selected by business and trade groups and other constituencies.
但只有约半数的议员由民众直接选出，其余议员则是由工商界团体和其他选民团体推选出来的。
Methods A total sampled population of 3308 from 35 selected spots in Eryuan County by random sampling were investigated.
方法采用随机抽样法在全县抽取35个自然村为调查点，每个调查点随机抽取35户居民作为调查对象。
There were 138 polymorphic alleles, 89.6% out of 154 amplified loci based on 17 selected ISSR primers with average 8.12 alleles each primer that shown a rich genetic diversity among the population.
结果表明：17对引物共扩增出154条谱带，其中多态性谱带138条，占89.6%，平均每个引物扩增出8.12条多态性谱带，表现出丰富的多态性。
There were 138 polymorphic alleles, 89.6% out of 154 amplified loci based on 17 selected ISSR primers with average 8.12 alleles each primer that shown a rich genetic diversity among the population.
结果表明：17对引物共扩增出154条谱带，其中多态性谱带138条，占89.6%，平均每个引物扩增出8.12条多态性谱带，表现出丰富的多态性。
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