The train is the easiest and most eco-friendly way to get around in the world. Trains allow you to travel in safety and comfort.  (代替) flying over the sights or  (疲惫不堪的) while driving, trains provide you with a more pleasant view along the way. In addition, passengers  (被允许四处走动) from one carriage (客车厢)to another on a train, which  (使旅行更舒适). Cell phones are also permitted. What's more, trains are very cheap  (与……相比)other means of transport. It may also be a wise choice, especially for families with children, who are usually fascinated by trains. Some people think trains are slow, but  (事实是) trains travel fast, too. The bullet train can travel very fast,  (以……速度) over 350 kilometers per hour, and  (使用更少的能源). I still remember  (我第一次参观北京). My parents and I   (出发) on a high-speed train in Shanghai and just about five hours later we arrived at Tian'anmen Square.