The effect of bubbly layer on propulsion performance of planing craft is investigated by means of self-propelled model experiment in the towing tank of China Ship Scientific Research Center.

在中国船舶科学研究中心拖曳水池中，通过滑行艇模型自航试验，研究了艇底气层对滑行艇推进性能的影响，结果表明：气层对采用水螺旋桨推进的滑行艇推进性能的影响不大。

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We see that the business model that propelled success during the last bull market and economic boom isn't going to work as well in the economy that is likely to emerge after the recession.

我们看到在上一个牛市阶段促使他们成功并造就繁荣的业务模式，在衰退后的市场中将不会起到同样效果。

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The model plane is propelled by a plastic band.

这架航模飞机是由橡皮圈推进的。

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While this model has propelled our economy for most of my adult life, it is useful to step back and put this trend in historical perspective.

FORBES: A New Era -- the Era of the Customer

It is struggling to shift China away from the current unsustainable model, where growth is propelled by vast investment and export-led manufacturing, towards one where domestic consumption plays a bigger role.

ECONOMIST: China's future