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。

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came the steamboat; although flatboats and keelboats continued to be important until the 1850's steamboats eventually superseded all other craft in the carrying of passengers and freight.

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连接在蒸汽机上的旋转式发动机使轴承转动，机器得以驱动，从而使得利用蒸汽动力纺线和织布的工厂出现。

A rotary engine attached to the steam engine enabled shafts to be turned and machines to be driven, resulting in mills using steam power to spin and weave cotton.

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不需要蒸汽时，液体保持在熔点以上，需要蒸汽时液体才能变成固体，释放其储存的能量。

The liquid is maintained above its melting point until steam is required, at which point the liquid is allowed to turn back into a solid, releasing its stored energy.

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One-third of every steamboat built in the United States before 1850 exploded and destroyed became a wreck.

850年以前,美国制造的每三艘蒸汽船,就有一艘爆炸或毁坏,彻底地报销

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And there is a preserved steam railway down

而且那里有一个保留下来的蒸汽火车，

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Steamboats became the romantic symbol of this great transportation revolution and all of this movement.

蒸汽船成了浪漫的象征,代表着伟大的交通革命及其所有运动

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