And so, study on the city major accident emergency system haves important society's practical meanings.
因此，加强城市重大事故应急系统的研究具有重要的社会现实意义。
Therefore, it is to be imminent to establish the rivers and streams significant pollution accident emergency monitoring system.
因此，建立起江河重大污染事故的应急监测体系已迫在眉睫。
At present, accident emergency aid system in China is not perfect, which leads to very high rate of death and disability.
我国目前交通事故的死亡率、致残率居高不下，很大的一个原因是紧急救援体系还很不完善。
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