英语语法分析

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。

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？

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came the steamboat; although flatboats and keelboats continued to be important until the 1850's steamboats eventually superseded all other craft in the carrying of passengers and freight.

首先是蒸汽船，虽然1850年时蒸汽船最终取代了所有用来运载乘客和货物的船只，随后平底船和龙骨船仍然相当重要。