Hybrid technology, combining electric batteries with a petrol-driven back-up engine, is well established.
混合动力技术，(结合了电力电池盒汽油驱动的后备引擎)已经确立。
While super-gentle acceleration keeps the vehicle in electric-only mode, it also drains the batteries quickly, often causing the gasoline engine to come on just to recharge the battery pack.
当车辆在非常缓慢的加速过程中将只使用电能，同时电量消耗非常快，常常会使汽油发动机随后只为电池组充电而启动。
Tesla's main strength has been stellar technology for electric car batteries and powertrains-the portion of the car that actually transfers energy from the engine and transmission to the wheels.
特斯拉的主要优势一直是电动汽车电池及传动系统的差压变送器（stellar）技术。 传动系统是从引擎实际传送动力并输送到车轮的部件。
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