The survey covers a representative sample of schools.

调查覆盖了有代表性的一些学校。

《牛津词典》

Extracurricular activities reflect the differences in child rearing in the Pew survey, which was of a nationally representative sample of 1,807 parents.

皮尤研究中心对全国范围内具有代表性的1807名父母组成的样本进行了调查，发现课外活动反映了育儿方式的差异。

youdao

Extracurricular activities reflect the differences in child-rearing in the Pew survey, which was of a nationally representative sample of 1,807 parents.

课外活动反映了皮尤研究中心育儿方式的差异，这是从对全国1807名家长的代表性抽样调查的结果。

youdao

One person might be a little low one day, another person might be high, a lot of people might-- you might happen to have captured them on an average day, but overall it averages out, so you get a representative sample.

一个人可能某一天少吃些,另一个人可能多吃些,很多人都会这样,你可能正好得出人们,平均每天的摄入量,但把它的整体平均一下,就得到有代表性的结果

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

YouGov surveyed a representative sample of 1, 617 adults, online, on 9 and 10 February.

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The bonds used in the representative sample tend to be the largest and most liquid in the index.

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It is hard to construct a representative sample in a country as large, diverse and unequal as Brazil.

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