The seeds go into this drum, this motor turns the drum seventy revolutions a minute.

咖啡豆进入滚筒，电机每分钟转动滚筒七十圈。

Those moving loops of wire can be used to do mechanical work, like turning the drum in your washing machine, or your power drill, or the fan that probably cools your computer.

这些移动的电线环可用于进行机械工作，例如将滚筒变成洗衣机，或钻孔电源或可能冷却计算机的风扇。