人工振铃manual: adj. 1.手的,手作的,手工的,用手操作的;便于手头 ...ring: vt. (rang rung ) 1.鸣,敲(钟),摇( ...down: down3 n. 1.(装被、褥等用的)鸭绒 ...ring down: 响铃look down on manual work: 轻视体力劳动下载手机词典可随时随地查词查翻译