The employee must either remove or bypass machineguards or other safety devices, resulting in exposure to hazards at the point of operation;
工人必须拆除机器护罩或其他安全设施，或将其旁通，导致操作点处于危险之中；
2
Sometimes they are forced to skirt the concrete machine gun emplacements of Iranian border guards, at others they have to wade across freezing mountain streams or negotiate sheer precipices.
有时，他们被迫绕过伊朗边防军的混凝土机枪阵地，有时，他们不得不趟过寒冷的山涧溪流或绕过峻峭的悬崖。
3
"Some day you might use the knowledge you learned here to build a machine that guards the reserve, instead of me," he told Shi.