The early electric cars were forerunners of today's electric vehicles.

早期的电动车是今天电动车的先驱。

The company is converting its fleet to electric vehicles.

这家公司正在转换其车队为电动车。

The government is popularizing the use of electric vehicles.

政府正在推广电动汽车的使用。

Many automotive companies are investing in electric vehicles.

许多汽车的公司正在投资电动汽车。

Engineers are working on a new powertrain for electric vehicles.

工程师们正在为电动车设计新的动力系统。

The market demand for hybrid electric vehicles is growing rapidly.

混合动力汽车的市场需求正在迅速增长。

Many cities are promoting electric vehicles to improve air quality.

许多城市正在推广电瓶车以改善空气质量。

Engineers are working to improve the horsepower of electric vehicles.

工程师们正在努力提高电动车的马力。

Engineers are working on improving the propulsion of electric vehicles.

工程师们正在改进电动车的推进力。

Electric vehicles are becoming more popular due to environmental concerns.

由于环境问题，电动交通工具越来越受欢迎。