This uses 20 times less energy for every mile or kilometer that you travel than a car, which means not only is this thing fast to charge and really cheap to build, but it also reduces the footprint of your energy use in terms of your transportation.
比起汽车来， 它每英里或公里能节约20倍的能量， 也就是说这个不仅充电快 做起来也很便宜， 就运输而言也减少了 能量的消耗。