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。

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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。

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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。

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These analyses are based on the assumption that the animals collected represent a randomly selected and thus representative sample of the population.

ECONOMIST: Animal personalities

Jurors selected are supposed to represent a cross-section of the general population in order to promote a fair trial.

FORBES: Rajaratnam Jury Selection -- This Is Going To Get Complicated

Within the initiative of Joint Programme targeted at creation of new income generation opportunities and promotion of improved agricultural practices, 24 rural farmers and dehkhans (small farmers) in target areas were selected to form a network of agriculture extension agents (rural consultants) responsible for provision of consultancy services to rural population and solutions to the problems they might face in application of new agricultural practices.

UNESCO: OFFICE IN TASHKENT