Abuld-it-yourselfsolarstill（蒸餾器）isoneofthebestwaystoobt...
問題詳情：Abuld-it-yourselfsolarstill（蒸餾器）isoneofthebestwaystoobtaindrinkingwaterinareaswheretheliquidisnotreadilyavailable.DevelopedbytwodoctorsintheU.S.DepartmentofAgriculture,it’sanexcellentwaterco...