In addition, some signs in the location of the problem, such as large objects or buildings, trees and other cover, it will give people a lot of trouble.
另外，有些标识牌在位置上也存在问题，如被大型物体或者建筑、树木等遮挡，也会给人们带来很大的麻烦。
2
If shield currents are not returned properly, they can show up in a remote part of the system and perhaps cause trouble in a location totally unrelated to the shielding problem that was "solved."