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Air travel has two advantages over train travel. First it can save much time.We can fly from Beijing to Guangzhou jusi in two hours but by train we have to spend 24 hours or more. Second air travel is more comfortable because the plane flies so smoot qly that we can rest well during the trip while the train is crowded sometimes and passengers have to sit for a long time which makes them tired. But train travel also has its advantages. For example traveling by train costs only 250 yuan while traveling by air will cost 900 yuan.Besides this outside of the train's windows we can enjoy the views of many big cities such as Zhengzhou Wuhanad Changsha.So I think different people like different ways of traveling.