This article discusses how to implement IP-based disaster tolerance and switching between the two Multimedia Messaging Service Gateway systems in a dual-networking mode so that the normally running MMSG system can take over in an easy, fast and seamless manner all services on the broken-down MMSG system.
2. 足球- 相关的四肢瘫痪的影响之方式已经在 1976 和 1980 到 3 之间每一百万从 1991 到 1993 从每一百万个运动员 13个情形的一个山顶减少，大概有系统的研究和一个被组织的努力结果除去高危险行为。
The incidence of football-related quadriplegia has decreased from a peak of 13 cases per one million players between 1976 and 1980 to 3 per million from 1991 to 1993, mostly as a result of systematic research and an organized effort to eliminate high-risk behavior.
The world's transport systems would fall apart without a supply of electrcity.
Sichuan earthquake in Tangshan earthquake and the same is the lifeblood of cities and towns in the electricity supply system destroyed, water and cleaning difficult conditions; feces, sewage and garbage treatment system of emissions paralyzed the medical epidemic prevention system was severely damaged.