The Sky Railway
[1]Sitting back in my seat, I can't quite believe that I'm about to① travel along the railway [2]that many foreign experts claimed was “impossible”．The train has been racing along steadily② since it left Xining.All this time, the song “Sky Railway” has been playing inside my head.The words “railways like massive③ dragons are winding among the mountains” seem particularly vivid④ as I travel across the “roof of the world”．
[1]Sitting back ...为现在分词短语作伴随状语。
[2]that引导定语从句，修饰先行词railway。
I was one of the people [3]who came from all parts of China to work on this railway.[4]Taking years to complete, the QinghaiTibet Railway is a record of all of our efforts to overcome the most difficult engineering challenges⑤.[5]How to protect the delicate⑥ ecosystem was among the top concerns⑦.
[3]who引导定语从句，修饰先行词people。
[4]Taking years ...为现在分词短语作伴随状语。
[5]“疑问词＋不定式”结构作主语。
The first landmark⑧ [6]to catch my eye⑨ is the splendid⑩ Qingshuihe Bridge, the world's longest bridge [7]built over permafrost?.Look! A group of Tibetan? antelopes? is moving under the bridge, with some stopping to eat grass at their leisure?.Thirtythree passages? have been built under the railway [8]to allow the animals to move safely and freely in their natural habitat.Wild animals such as these Tibetan antelopes have now been using these passages for years.They seem totally unaware? that we are speeding past at over 100 kilometres an hour.
