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The propeller can't work well.
螺旋桨工作不稳定。
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When the US and China work together, we can be an anchor of world stability and a propeller of world peace.
中美两国合作好了，就可以做世界稳定的压舱石、世界和平的助推器。
In this step, work to drill for the pipe of a propeller shaft or a rudder.
在这个步骤中，演练工作，为管道的传动轴或舵。
His latest work in progress is a submarine, complete with half-tonne propeller, that will take centre stage in a children's playground.
BBC: How to build a bigger, better corkscrew
Ordinary rotors do not work on such a small scale, so Friend's micro-robot project has a special flagellated propeller, mimicking the swimming behaviour of E.coli bacteria.
CNN: Nanobots get to the heart of the matter
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