这一研究证实了发球趋避动机冲突对发球表现所产生的影响。

The research testified the influence of approach-avoidance motive conflict on serve performances.

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许多人认为黄金是“反美元”的，因此，如果美元表现状态良好，他们就没有拥有黄金的动机。

Many people see gold as the “anti-dollar”, so if the greenback does well, they have less incentive to own bullion.

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一辆汽车堵塞的燃料管道，会阻碍加速器的运行，对它进行结构检查，在杂乱仓促的运转中也许能显示出发动机空闲时不会表现的问题。

MECHANICS checking for a blockage in a car's fuel pipes know to floor the accelerator, for a splutter then indicates a problem that may not show up when the engine is idling.

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It includes anhedonia and a lack of motivation.

其表现是快感和动机的缺乏。

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