But such false or stolen documents frequently are difficult to detect, and access to computerized databases may be non-existent, particularly for law enforcement or border control officers working outside an office or in remote areas.
但是，这种伪造和偷窃证件常常难以查验，执法及边管人员也可能无法进入计算机数据库，在办公室外或偏远地区执勤的人员尤其如此。