The key to this problem is to control the amount of rescuing material and keep it in a rational degree. Subsequently, this reasonable system will exert better function.
问题的关键是控制救援物资的数量，使它们保持在合理的范围内，这一合理制度才能更好地发挥作用。
2
Urban stormwater management system with rational structure and function is necessary to improve management effectiveness, reduce the error in decision and lower the impact of urban stormwater.