Sometimes,thesimplestideasarethebest.Forexample,toabsor...
问题详情:Sometimes,thesimplestideasarethebest.Forexample,toabsorbheatfromthesuntoheatwater,youneedlarge,flat,blacksurfaces.Onewaytodothatistobuildthosesurfacesspecially,ontheroofsofbuildings.Butwhygotoall...