double back片语动词KK [ˋdʌbəl bæk] /ˈdʌbəl bæk/发音片语动词1折返、返回原路、往回走The hikers doubled back when the trail suddenly disappeared.小径突然消失,健行的人只好循原路折返。2绕回、迂回折回The suspect doubled back through the alley to lose the police.嫌犯从巷子绕回去,想甩掉警察。3对折、折起可拆开She doubled the thick blanket back to fit it in the box.她把厚毯子对折起来,好塞进箱子里。用这个字练口说→