近些年来,我国接连遭受了雨雪冰冻、汶川大地震、玉树大地震及雅安地震等自然灾害。一序列自然灾害的发展绷紧了全国人民的神经,也受到了全球的高度关注 In recent years, China has suffered a series of natural disasters such as snow and ice freezing, the Wenchuan Earthquake, the Yushu Earthquake and the Ya’an Earthquake. The development of a series of natural disasters has tightened the nerves of the people throughout the country and has also attracted the world’s great attention