Great writers are those who not only have great thoughts but also express these thoughts in words which have powerful effects on our minds and feelings.

伟大的作家不仅有伟大的思想，而且能够用文字表达这些思想，他们的文字对我们的思想和感情有强大的影响。

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Experience with such incentives shows that they do have powerful effects in controlling costs.

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In so fraught an atmosphere, mere gestures can have powerful effects.

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That in turn may have powerful effects.

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