A surge propelled by the costs of extraction would be a negative productivity shock for the global economy.

开采成本的急剧提高对全球经济的生产力存在负面作用。

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That surge is delivered by cortisol, a stress hormone often linked with negative biological effects, such as depression and obesity.

其表现在皮质醇含量的升高。这是一种应激激素，它总会和一些负面的生物学效应联系在一起，比如沮丧和肥胖。

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When the pump sets lose electricity during operation, for the sake of preventing pipe failure by negative pressure, installed a surge shaft at the head of the pipe line.

当泵组运行失电时，为防止负压对管道的破坏，在管道首都设置了调压井。

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After an initial surge of negative sentiment following their peak, and now that they have declined further, some analysts are once again turning positive.

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The findings reflect a remarkable fall in the fortunes of the Democrats from their surge in the 2006 midterms (33 percent negative versus 82 percent negative for the GOP).

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Ed Miliband was helped by events such as the surge in oil prices and Britain's slip back into negative growth late last year.

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