First,electric cars have regenerative braking, whichmeans that when you use the brakes (刹车) in anelectric car, the battery has a chance to recharge(再充电). On the contrary, when you brake in agas-powered car, you actually use energy. Also,during the production of electric cars, more timeand energy is spent making the design lighter andmore aerodynamic so that there will be less dragfrom the wind. This allows them to travel fartherusing less energy than a gas-powered car woulduse to go the same distance.