它的产品线中已经有五款混合动力车型，所以它不必像它的竞争对手一样，为了满足燃油经济性标准而急着要给车型瘦身减排。
Thanks to the presence of five hybrids in its lineup, it doesn't face the same pressure as its competitors to downsize its models to meet fuel economy standards.
这一切，其背后的驱动力就是混合动力车其燃油经济性可以提高近25%。
The driving force behind this is hybrids' supposed offer of up to 25% better fuel economy.
汽-电混合动力汽车之所以燃油经济性好，是因为它可以在频繁起步停车的市区行驶时使用电动机，在一般的行驶中使用汽油发动机。
Petrol-electric hybrids attain their fuel economy by using electric motors in stop-start city traffic and petrol engines when cruising on the highway.
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