engine与locomotive这两个名词都可表示“机车、火车头”之意。
engine与locomotive都可作“机车，火车头”解，其区别在于所使用的地区不同。engine是英国英语，而locomotive为美国英语。
- steam/diesel/electric locomotives
蒸汽 / 内燃 / 电力机车 - Steam locomotives pumped out clouds of white smoke.
蒸汽机车喷出一团团白烟。 - 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。
