In the last few years, important technological advances in railroad building have taken place.

在过去几年里，铁道施工取得了重大进展。

youdao

The high point in railroad building came with the construction of the first transcontinental system.

高点在铁路建立施工附带的第一次跨洲体系。

youdao

Railroad building requires an enormous sum of capital, and there is a long period of time before any profits are realized.

修建铁路需要巨额资金，而且要等很长时间之后才能获得利润。

youdao

Before John Henry was six years old, he was carrying stones for workers building a nearby railroad.

VOA: special.2009.02.21

The cost of building the railroad was very high.

VOA: special.2010.02.25

The fact that there is any power shortage this year after all the railroad building and power plant construction since 2004 undercuts the message that China is reforming its economy and seeking to rebalance it.

FORBES: Who Turned Out the Lights in China?

Of course our governors can encourage or mandate certain activities or stimulate or direct particular undertakings--land for railroad building in the 19th century, highway construction and space exploration in this one--but that's a far cry from directing the whole economy.

FORBES: Fact And Comment

And to do that, it's like building the Transcontinental Railroad.

WHITEHOUSE: Online Town Hall