Abuld-it-yourselfsolarstill（蒸馏器）isoneofthebestwaystoobt...
问题详情：Abuld-it-yourselfsolarstill（蒸馏器）isoneofthebestwaystoobtaindrinkingwaterinareaswheretheliquidisnotreadilyavailable.DevelopedbytwodoctorsintheU.S.DepartmentofAgriculture,it’sanexcellentwaterco...