Many people prefer to travel by air. This is because air travel has many strengths .They are convenient, fast, time-saving, comfortable and so on .however, air travel also has many deficiencies .They are ticket price is expensive, some passengers to air travel, often feel the body is unwell, and even some people also worry about to crash
现在许多人愿意乘飞机的空中旅行有许多优势。他们是方便，快捷，省时，舒适等。然虚桐册而差宏，空中旅行也有许多不足之处。他们门票价格贵，一些乘客空中旅行，常常感到身轮氏体不适，甚至有人还担心，坠毁
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