Major solutions in the past are desalination and the building of dams and canals.
However,there are many problems and shortcomings for those solutions.
英语翻译中文：在过去,主要的解决方案有海水淡化或建造大坝运河.可是,这两种解决方案都存在着一些问题和不足.英文：Majo
Major solutions in the past are desalination and the building of dams and canals.
However,there are many problems and shortcomings for those solutions.