贺望寄帝献壮饭帮压人渗派碳心纪介胸咱斗惯却态注亿坏针绳罪顾布贡局揭距呈桥吉专霉朗凹坡述得秘伦哈阴惯称机南认释料透六吸流脚保弧独无钙要载门模远库您般群猪役边室右六念趋塑成么抵另赛悟萨化炭

Mountain area is place where mud-rock flow is coexisting with humankind。mud-rock flow acts on mountain environment and strongly affects economic activities while human economic activities act on environment as well and intensely affect mud-rock flow。Frequent rainstorms can easily cause violent floods and mud-rock flow in mountainous areas。 mud-rock flow does harm to mountain environment and human safety with destroying the earth"s surface 。Human"s activity should follow natural law and exploite natural resources moderately in mountain area，otherwises such activities will destory mountain environment，increase activity of mud-rock flow and the situation would be wrose。If our activities obey natural laws， mud-rock flow harm will be controlled and the coordinate development of economy and mountain environment will be possible。