系统在运行过程中,出现故障的情况下,需要对一些运行的中间状态参数进行保存,以备系统恢复后继续保持原先状态,这个代码主要就是完成这一功能-System in the running process, the failure of circumstances, the need to run between some state preservation parameters for a system recovery to continue to maintain the original sta