加拿大北部山区气候寒冷,冬季大雪不断,通讯电线上落满了积雪,并结成了一层冰层,使得大跨度的电线经常被积雪压断。有时大雪封山,被压断的电线修复起来非常困难,市区通讯常常要中断数日后才能恢复。通讯中断给广大市民的生产和 The mountains in northern Canada have a cold climate and heavy snowfalls in winter. The communication wires are covered with snow and form a layer of ice, which can cause long-span wires to be crushed by snow. Sometimes it is difficult to repair a broken mountain by a heavy snowfall, and urban communications often have to be interrupted for a few days before they can be restored. Communication interruption to the general public’s production and