All these have some negative effect on training.

这在一定程度上影响了培训效果。

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Sometimes market may meet failure and even have some negative effect.

市场有时会“失灵” ，甚至会产生负面效应。

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Recent experience in some countries has shown that overproduction not only wastes money and time, it can also have a negative effect on the plant's future yield.

一些国家的最近经验显示，超额生产不仅浪费资金和时间，还可对植物的未来产量产生负面影响。

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The goal of the trial was to show that Simdax reduced mortality by 25% compared with dobutamine, which some doctors believe may actually have a negative effect on how long patients live, at the end of six months.

FORBES: Magazine Article

Mr. IQBAL ZAFAR JHAGRA (Secretary General, Pakistan Muslim League): Because they are the popular leaders of this country, and keeping them out of the country is giving rise to a political leadership vacuum, which is going to have a negative effect and there might be some other forces which would fill this vacuum.

NPR: Musharraf Sparks Political Crisis