我们还必须添加货运成本。
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came the steamboat; although flatboats and keelboats continued to be important until the 1850's steamboats eventually superseded all other craft in the carrying of passengers and freight.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。
The vast expansion in international trade owes much to a revolution in the business of moving freight.
"国际贸易的大幅增长在很大程度上归功于货运行业的一场革命。
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