Someinventionsaresouseful,butseemsosimple,thatwewonder...
问题详情： Someinventionsaresouseful,butseemsosimple,thatwewonderwhynoonethoughtofthemlongago.Post-itNotes,thepiecesofpaperthatyoucanfastenalmostanywhereandthenremovewithoutleavinganysignthattheywereth...