So the system is not foolproof." "But overall,it is in our view, the better system than anywhere else in the world because it gives average citizens an opportunity to listen to the evidence and make independent judgments the government is not part of."

VOA: special.2009.08.31

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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