"engine"的定义和意义

What is an "engine"?

An engine is a machine that converts fuel into power to make a vehicle run. In most vehicles, the engine burns fuel, such as gasoline or diesel, to create energy. This energy is then used to move parts like pistons, which turn the wheels. The engine is often considered the heart of a vehicle because it powers all its movements. The performance of the engine, such as how efficiently it uses fuel and how much power it produces, directly affects how well the vehicle runs.