你一定还记得去年美国发生的9·11事件吗？由于恐怖分子的劫机毁楼事件，美国机场的安检设备受到了公众的严厉指责。因为，在乘客上飞机之前，所有的行李都曾受到过民航系统的安全检查。然而9·11事件却证明了，这些初步的检查还是能让恐怖分子有机可乘。于是人们问道：“我们 Do you still remember the September 11 incident in the United States last year? As a result of terrorist hijackings and building demolition incidents, the security equipment of the US airport has been severely criticized by the public. Because, before the passengers were on the plane, all the luggage had been subjected to the safety inspection of the civil aviation system. However, the 9/11 incident proved that these preliminary inspections still allow terrorists to take advantage of it. So people ask: "We