Gadgetry is small machines or devices which do something useful.
例句
In the days before domestic gadgetry and time-saving appliances, food preparation took up most of the day.還沒有家用小器具和省時(shí)的家用電器的時(shí)候，準(zhǔn)備食物得花大半天時(shí)間。...a passion for the latest electronic gadgetry.對(duì)時(shí)新電子小玩意的癡迷