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本文系统地介绍城市地震灾害的主体，震害的特征及按时间、空间序列的发展过程。城市震害是多种灾害同时发生、相互影响，并且多种灾害在时空序列上都有发生、发展和延续的过程。通过对以往几次城市地震灾害的现象的研究、展示其在时空序列的分布规律，力求找到各种灾害与抗震救灾活动的对应关系
This article systematically introduces the main body of urban earthquake disaster, the characteristics of earthquake damage and development process according to time and space sequence. The urban earthquake disaster is the occurrence and development of many kinds of disasters and their mutual influence, and the occurrence and development of various disasters in the space-time series. Through the researches on the phenomenon of several urban earthquake disasters in the past, the paper presents the distribution rules of time-space series and seeks to find the correspondence between various disasters and earthquake relief activities