但确有危险信号显示，驱动德国经济的出口马达正劈啪作响。
Yet there are worrying signs that the export motor that drives the German economy is sputtering.
计算机把他们转化成控制仿生手臂的电动马达的信号。
The computer translates them into signals that control small electric motors in her new arm and hand.
由于其驱动信号是可以由结构简单的叉指电极激发的声表面波，因而克服了一般的超声马达结构复杂，制造困难以及小型化困难等缺点。
Because its driving signal is surface acoustic wave, thus it overcomes the shortcomings of complex structure, difficult fabrication and miniaturization in normal ultrasonic motor.
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