And as we get our cars more fuel-efficient, that's going to be reducing the amount of revenue that you get off of those gas taxes, so we need to charge people by the mile that they drive.
如果我们能降低汽车的油耗， 就会相应的减少你所需缴纳的燃油税， 因此我们需要按照驾驶人实际行驶的里程进行征税。