随着其服役时间的增加，桥梁结构难免会出现各种各样的疲劳和损伤从而引发坍塌等恶性事故，造成了巨大的经济损失和人身伤害。
Along with their service time increase, the bridge structure can appear unavoidably various weary and damage, which lead to malignant accident, huge economic loss and person injures.
最近几年瓦斯事故发生频繁，瓦斯爆炸夺走了许多矿井工人的生命，给国家造成了重大经济损失。
Gas explosions occur often in some recent years, gas explosions kill mine workers, and make much economic damage.
尤其是在对施工设备的使用方面，如果管理和操作不当，势必造成经济损失和人员伤亡的重大事故。
Especially for the use of construction equipment, if we manage them or operate in wrong way, it may cause economic loss and major casualties.
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