乘坐飞机时，在飞机即将起飞的时候，乘务员总会提醒乘客将手机关闭。究竟为什么飞机上禁用手机呢？你可能只知道这与安全相关，那么使用手机究竟能造成多大的危害呢？读了下面这篇文章，你就会有所了解了。

Nowadays, more people are using cell phones and there is also an increase in traveling by air. Naturally, more people want to use their cell phone while traveling by plane.

However, they cannot.

The funny thing is that there has been no evidence of a cell phone signal causing a disturbance in the flight.

If you use thefixed-line telephoneon the plane, it can be really expensive.

In America, this kind of telephone charges three dollars a minute, and 15% of the income of the flight comes from the telephone bill.

In 1998, an Englishman named Neil Whitehouse was sent to prison for one year because he refused to turn off the cell phone.

Swiss investigators assumed that the LX498 air accident is possibly related to the cell phone disturbance, which left 10 people dead. 　

Last month, a plane that was flying to Sarajevo suddenly became alarmed and was forced to land. Investigators found a cell phone in a piece of luggage that had been left on.

Flight crew insisted that using cell phone during the flight is very dangerous, and many facts support that claim.

Although there is no factual evidence to prove this, cell phone disturbance can affect the plane in some circumstances.　

So, why do people have to use cell phone on the plane anyway?

People have a busy work schedule and sometimes need to keep in touch with others during a flight.

There is one explanation that sounds reasonable. The frequency between a cell phone and a plane's eqipment is different, and this may be the cause of any disturbances.

With the rapid development of technology, they will surely figure this out soon.

fixed-line telephone: 固定电话

（来源：wsbedu.com 实习生刘佳煦 英语点津 Annabel 编辑）

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