flattyn.平底鞋；警察flatadj.平坦的；扁平的；单调的；断然的；[音乐]降音的；气不足的adv.平直地；直截了当；低于标准音高地n.<英>公寓；平面部分；[音乐]降半音；泄气轮胎v.变平；降调；住公寓flat rate system按期收费制flat-roof deck平屋面flat back lumber平板龙骨flat toothed bit平底牙轮钻头flat table guide平台导承flatting varnish无光清漆flat die forging平面模锻flat-bed press平板热压机flat coal shovel平煤铲flat-rope reel扁钢丝绳绞轮