积欠的英文：
in arrears
Average loan life - ALL:A composite indicator of how long a loan remains outstanding.
贷款平均偿付期限(简写为ALL):表示一笔贷款积欠时间的综合指标。
n. 到期未付款，欠款欠帐；拖欠，（工作等的）拖延；待完成的事
As the man was unemployed, the council decided to write off the arrears of rent.
因为这个人失业，地方议会决定取消其欠租。