In between, perhaps some more realistic options on this lever, transport lever, are electric vehicles, so electric bikes and electric cars in the middle, perhaps four times as energy efficient as the standard petrol-powered tank.
在这两者之间，可能还会有些更实际的选择 在交通业上，有电力驱动的机车， 所以，电动自行车和电动汽车当其中， 相对于使用汽油的车子 它们也许可以节能四倍。