The administration is counting on an improving job picture to keep majority control of both houses of Congress.
VOA: standard.2010.06.18
When you get--this is Rituparna, counting the leaves on a tree-- you can estimate, from a sample, the population expected values.
如果你...像数叶子的睿都巴若那一样,只有部分样本的话,你可以来估计总体均值
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