蒸汽动力的实用性和对新机器的需求促进了钢铁工业的转型。

The availability of steam power and the demands for new machines facilitated the transformation of the iron industry.

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蒸汽的高成本、加上货运对速度的低需求，使得世界上大多数的海运货物都是通过帆船来运输的，直到20世纪初，这一状况才有所改变。

The high cost of steam and the lesser need for speed kept the majority of the world's ocean freight moving by sail until the early years of the 20th century.

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在这里再次有蒸汽空气选手的照顾您所有的丝绸的需求，并有蒸汽电动手铁对新闻界。

Here again there are steam-air finishers that take care of all your silk needs, and with a steam electric hand iron on the press.

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