Tom went on whitewashing the fence--paid no attention to the steamboat.
汤姆继续刷着栅栏，没注意那只汽船。
2
What accounts for the great outburst of major inventions in early America—breakthroughs such as the telegraph, the steamboat and the weaving machine?
是什么导致了早期美国例如电报、蒸汽船和织布机的重大发明的大量涌现？
3
First came the steamboat; although flatboats and keelboats continued to be important until the 1850's steamboats eventually superseded all other craft in the carrying of passengers and freight.