跪求人工英文摘要翻译时至今日，对于航班延误现象，民航企业也未曾给出明确的定义，一般来说，旅客们把比预定起飞时间和到达目的

Today, for flight delay phenomenon, the civil aviation enterprises are also did not give a clear definition, in general, the passengers to later than scheduled time of departure and destination of the flights are thought to be delays. Or the flight cancellations are defined as flight delays. In fact, this kind of understanding is wrong. Air transport itself in railway and highway transportation is different, in the air transport has the particularity and the existence of potential risks, and requirements as well as rail and road transport must be indicate the take-off time is hard to do, so we can not to a unified standard to define flight delays, but there is no standard doesn't mean all the phenomenon of flight delays is normal, do not represent the airlines can not responsible for passengers, not to make any explanation, it involves the complexity of the phenomenon of flight delays reasons, also the contradiction between the passengers and airlines, often appear in the flight delays. In this paper, through literature research and field research on civil aviation flight delays occur, the causes and of psychological state of passengers and after a brief overview of the service content, and puts forward some Suggestions in combination with related cases.