The debris flow gullies of Banzi, Taoguan and Chediguan generate low frequency and low viscous debris flows or hyper-concentrated flows with an average interval of 20~50 years.
板子沟、桃关沟和彻底关沟均为低频率泥石流或高含沙洪水，平均20～50年发生一次；
Invocation elapsed time: The average, minimum, and maximum elapsed time for an invocation per interval.
调用运行时间：调用在每个间隔时间内的平均、最短和最长运行时间。
The MMR declined by an average of 5% per year (crude relative risk, RR: 0.95; 95% confidence interval, CI: 0.94-0.97).
孕产妇死亡率年均下降5%(未经整理分类的相对危险：0.95；95%置信区间：0.94 - 0.97)。
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