unpaid

adj.

未付的；（债等）未还、未缴纳的；不支付薪水服务的；

unpaid leave无薪假；准假停薪

1. While old debts are still unpaid, new ones are incurred.
   老账未清，又欠新账。
2. The salesmen claim for back payment of unpaid commission .
   推销员要求结清所欠佣金。
3. He's taken unpaid leave for a month.
   他请了一个月的停薪假。
4. He's doing a month's unpaid work experience with an engineering firm.
   他正在一家工程公司无偿工作一个月以获得工作经验。

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