铁路也提供了数以千计的新工作：制造车厢、运营铁路和维修铁轨。

The railways also provided thousands of new jobs: building carriages, running the railways and repairing the tracks.

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任何变暖，无论来自气候变化还是铁路本身——会使铁轨的冷冻地基变得不稳吗？

Will any added warmth--either from climate change or the railway itself--destabilize the track's frozen foundation?

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举个例子，在火车前方的铁轨上有5个铁路工人，火车正在前进，这些人必死无疑除非实验主体即故事中的旁观者不袖手旁观。

For example: there are five railway workmen in the path of a runaway carriage. The men will surely be killed unless the subject of the experiment, a bystander in the story, does something.

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