[only before noun] owed for a time in the past到期未付的；拖欠的◆The company owed $2 million dollars in back taxes.公司拖欠 200 万元的税款。⨁back pay / rent / taxes欠薪／拖欠租金／拖欠税款 of or from a past time过去的；过期的◆back issues of a magazine过期杂志 ●on the back ˈburner (informal) (about an idea, a plan, etc.) left for the present time, to be done or considered later（指主意、计划等）暂时搁置  ➡  idiom at front adj. ●take a back ˈseat (to sth)to be given less importance than sth else处于次要地位◆Safety has taken a back seat to the need for cost reduction.为降低成本，安全的重要程度被降低了。to let other people play a more active and important role in a particular situation than you do（在特定情况下）允许他人领先，甘愿居于人下，让位◆Mr Clark has decided to take a back seat and be a non-executive director.克拉克先生决定让位，做一名非执行董事。  ➡  idiom at queue noun buy-back dial-back write-back