道路应当修建于洪水线之上，并且应设有充足的排水系统。
Roads should be built above flood level and have adequate drainage.
通过试验段的研究，为以后道路工程综合排水系统设计打下坚实的基础和技术储备。
Through the experimental section research, will build the solid foundation and the technical reserve for the later road engineer synthesis drainage system design.
美国的城市借钱来资助大型公共工程建设，比如道路和排水系统。
American cities borrow to finance the construction of large-scale public works like roads and sewerage systems.
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