So far hybrid drivetrains provide enough efficiency improvement and their electric motors develop such high acceleration that automakers have used the technology to raise both horsepower and fuel economy simultaneously.

• 目前的油电混合传动系统在效率方面大有改善，电动马达也具备优异的加速性能，因此汽车厂商采用混合传动技术同时提升马力和燃料经济。