我们的新办公室每小时可处理500通电话。

We can handle up to 500 calls an hour at our new offices.

《牛津词典》

不过我想你也应该知道，没有凯瑟琳阿姨的帮忙，小迪亚戈可打不了那通电话，不是吗？

I should know: you don't think little Diego made that call without his Aunt Kathrin's help, do you?

youdao

步进电机受脉冲的控制，通过改变通电的顺序可改变电机的旋转方向，改变脉冲的频率可改变电机的旋转速度。

Step motor control, by pulse by changing the order of electricity can change the motor rotation direction, change the pulse frequency can change the motor rotation speed.

youdao