steam locomotive

名词 steam locomotive:

1. a locomotive powered by a steam engine

1. The first steam locomotive, introduced in1825, had a top speed of only thirteen mph, and the great sailing ships of the time laboured a long at less than half that speed.
   1825年推出的第十辆蒸汽机最大速度每小时仅为13英里，而那时的大帆船行驶得更慢，还不到这个速度的一半。