The first steam locomotive, introduced in 1825, 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。
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