While better fuel-efficiency is good news for Americans' wallets and less driving good for the country's air, for its highways and mass-transit systems, it is something of a disaster.

虽然，更高的燃油效率能节省美国人的经济支出，少驾车也有利于改善美国的空气质量，但这对美国的高速公路和公共交通系统却可以说是一种灾难。

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First of all, more cycling and less driving.

首先，多骑车，少开车。

youdao

First of all, more cycling and less driving.

首先，多骑车，少开车。

youdao