Into the 20th century, steam propulsion became so advanced that you could ride a giant steamer across the ocean.
Into the 20th century, steam propulsion became so advanced that you could ride a giant steamer across the ocean.
到了20世纪时，蒸汽推进的技术越来越进步，你甚至可以搭著大型蒸汽船横渡海洋了。