Look at the bill's substantive provisions are a large number of the provisions of the United States to a general increase in the quality of primary and secondary education as a primary purpose.

细看这一法案的实质性条款，大量的规定都是以普遍提高美国中小学教育质量为首要目的的。

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In fact, he says, most negative ads serve a noble purpose: They are actually more substantive than positive ads.

NPR: Elections Loom; Now Is the Time for Negative Ads