1. 引擎;发动机
    The engine of a car or other vehicle is the part that produces the power which makes the vehicle move.

engine的近义词

    e.g. He got into the driving seat and started the engine.
           他坐进驾驶座，发动引擎。
    e.g. ...an engine failure that forced a jetliner to crash-land in a field.
           迫使喷气式客机在田地里紧急降落的引擎故障

2. 机车；火车头
    An engine is also the large vehicle that pulls a railway train.

    e.g. In 1941, the train would have been pulled by a steam engine.
           1941年，火车本可以由蒸汽机车拉动。