一些水利专家现在要求要更好地利用现存的基础设施,而不是建造新的设施.后者越来越被看成是最后,而不是第一的解决方案.
some water experts （主）are now demanding （谓）that existing infrastructure be used in smarter ways rather than building new facilities,which is increasingly considered the option of last,not first,resort.
which 引导主语从句