北水南调工程是东北地区一项大型的跨流域调水工程，优选调水量是其关键问题之一。
The North-to-South Water Diversion Project is a large-scale inter-basin water transfer project, and the reasonable determination of the volume of water diversion is a key problem.
应明确哪些前提是必须坚持的，哪些条件应尽量争取。“北水南调”工程应妥善解决松花江航运用水和哈尔滨环境用水问题。
We should know the essential problems at first, the project could solve the problems of sailing in Songhua river and environmental useful water in Harbin.
应明确哪些前提是必须坚持的，哪些条件应尽量争取。“北水南调”工程应妥善解决松花江航运用水和哈尔滨环境用水问题。
We should know the essential problems at first, the project could solve the problems of sailing in Songhua river and environmental useful water in Harbin.
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