The class scale is an important factor of affecting the teaching quality.

班级规模是影响教学质量的重要因素。

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The scale was more modest but the principles the same for the middle class.

对于中产阶级而言，规模要更小些，但原则则是一样的。

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Increasing the scale of this sort of operation is tricky, as the formal economy is often shallow and the middle class small.

扩大这种经营模式的规模需要慎行，因为形式经济学经常失于浅薄，而且中产阶级规模小。

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But nobody practices leverage on the scale of class action attorneys.

FORBES: Magazine Article

They happen often on the multi-million dollar scale, rather than the billion dollar scale of the flash crash, but they are the same class of event: The error trade.

FORBES: How To Regulate Robots With Fat Fingers

Republicans, on the other hand, have nominated somebody who believes that we should actually significantly increase the tax benefits that go to those at the top of the income scale and ask middle-class families to pay more to subsidize those tax benefits for the wealthy.

WHITEHOUSE: The White House