A hybrid vehicle can get by with a smaller internal-combustion engine than a conventional automobile because the battery and electric-motor system provides additional power when it is needed for acceleration or hill-climbing maneuvers.

• 由于在需要加速或爬坡时，混合车的电池和电动马达系统可额外提供动力，因此混合车可以使用比传统汽车更小的内燃引擎。