1. To become a backlog. 
   成为积压
2. A backlog of work, unanswered letters 
   积压的工作[待覆信件]
3. Plowed through the backlog of work. 
   费力处理一堆积压待办的工作
4. To acquire(something) as a backlog. 
   获得（某物）作为储备物
5. There is a large backlog of cases to hear. 
   有大量案件要审讯。

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• 1. 积压文件
  backlog5bAklRgn.大木材, 订货...backlog document积压文件...backlog order未交货的订货总额
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