你知道，有人那些旋转一次。
由于带盘每旋转一次动力元件都会驱动一下产生抽吸动作，因而还可增加动力元件的数量。
The dynamic element can be driven to generate the aspiration movement as soon as the tape spool rotates, so the number of the dynamic elements can be increased.
地轴不同于空间里的南北轴线。 地轴每天围绕南北轴线旋转一次，转速约为1000英里/时（合1604千米/时）。
The Earth's figure axis is not the same as its north-south axis in space, which it spins around once every day at a speed of about 1, 000 mph (1, 604 kph).
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