This chart shows the number of locomotive engineers, railroad conductors and brakemen increasing by nearly 600%. But that growth slowed in the early 1900s.

这张图表显示机车工程师、铁路售票员和制动员的数量增加了近 600%。但这种增长在 1900 年代初期放缓。

" Not even the locomotive engineer knows that, " said the switchman. And a second brilliantly lighted express thundered by, in the opposite direction.

“开机车的人自己也不知道。”扳道工说道。于是，第二列灯火通明的快车又朝着相反的方向轰隆轰隆地开过去。