Disaster phenomenon
灾象───Disaster phenomenon
country is a geographical environment is special, the geological condition quite complex country, the landslide and so on natural disaster phenomenon is serious.───我国是一个地理环境特殊，地质条件比较复杂的国家，滑坡等自然灾害现象严重。
by the natural and man-made factors, the ground subsidence is the disaster phenomenon of environmental geology with regionally ground level decreasing, which resulted in the compact of soil.───地面沉降是在自然和人为因素作用下，由于地壳表层土体压缩而导致区域性地面标高降低的一种环境地质灾害现象，是一种难以补偿的永久性环境和资源损失。
Coal (rock) and gas outburst is one of intense natural disaster, is also a complicated and dynamical phenomenon, caused by stress, gas pressure of coal bed as well as coal structure.───煤(岩)与瓦斯突出是煤矿严重的自然灾害之一，且是一种复杂的动力现象，是地应力、煤层中的瓦斯压力和煤的结构力学性质综合作用的结果。