motor train unit

例句：

1. 1. The newmodel of the train has a motor trainunit that can travel up to 500 kilometers per hour.
   这列火车的新型号配备了一个可以行驶每小时500公里的动力机车单元。
2. 2. The engineers have developed a new design for themotor train unit, which can reduce fuelconsumption by 20%.
   工程师们已经开发出了一种新的设计，用于动力机车单元，可以减少20%的燃油消耗。
3. 3. The construction of the railway linewill require the installation of several motor trainunits along the route.
   铁路线的建设将需要沿线安装几个动力机车单元。