排水系统一直是市政服务的主要问题。
Drainage has always been the main problem among municipal services.
风能还可以提供有针对性的能源生产服务，其目的是在一些重要地方满足水系统的需求。
Wind energy can also provide targeted energy production to serve critical local water-system needs.
风能还可以提供有针对性的能源生产服务，其目的是在一些重要地方满足水系统的需求。
Wind energy can also provide targeted energy production to serve critical local water-system needs.
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