His name was Arnold Parks. He caught another worker who had fallen off the top of the canyon.

VOA: special.2010.10.27

And so you feel helpless until you notice that there is, off to the right, a side track and at the end of that track, there is one worker working on the track.

你极为无助,直到你发现，在轨道的右侧，有一条侧轨,而在侧轨的尽头，只有一名工人在那施工。

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