spin rate

例句：

1. 1. The car's engine spins at a high rate.
   这辆车的引擎以很高的转速运转。
2. 2. The machine spins at a slow rate, which is not efficient.
   这台机器以慢速旋转，效率不高。
3. 3. The spinning of the wheel affects the rotational speed of the gears.
   车轮的旋转影响齿轮的旋转速度。