汽车在道路上行驶时每百公里平均燃料消耗量。
直到最近新近汽车的平均燃料消耗量相对于十九世纪八十年代中期仍然没有变化。
Until recently the average fuel consumption of new cars was unchanged relative to that in the mid 1980's.
但是，由于机动车生产商自主签署的减少二氧化碳排放的协议，有迹象表明在最近几年平均燃料消耗量已经开始下降。
However, there are signs that in the last few years average fuel consumption has begun to drop in response to voluntary agreements by vehicle manufacturers to reduce CO2 emissions.
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