a representative sample
双语例句原声例句权威例句
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The survey covers a representative sample of schools.
调查覆盖了有代表性的一些学校。
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A representative sample of manual tests are executed and timed.
一个代表性的手工测试的例子被执行，并记录时间。
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The findings were based on a representative sample of 1, 398 people over age 18.
研究人员选取了1,398个18岁以上的人作为代表性样本进行研究。
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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
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