或许还有其他10种降低动机的因素阻挠他们的实践。

Or maybe it's one of the other 10 types of demotivation that's keeping them from acting.

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奖励如何会适得其反，降低动机。有时候奖励确实能提高动机，特别是当工作有异议时。

Sometimes rewards do work to increase motivation, especially if the task is objectionable.

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最后一步是将蒸汽引入气缸，使得活塞前后推动，从而提高了发动机的速度，降低了燃料消耗。

The final step came when steam was introduced into the cylinder to drive the piston backward as well as forward, thereby increasing the speed of the engine and cutting its fuel consumption.

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