unpaid
[ʌnˈped]
adj.
未付的;
（债等）未还、未缴纳的;
不支付薪水服务的;
例句:
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They say unpaid work experience is not an option.
来自BBC
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The taxman caught up with him and demanded £7,000 in unpaid taxes.
税收人员查到了他，要求他把未缴纳的7,000英镑税款交上。
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Even unpaid work for charity is better than nothing.
即便是给慈善机构做义工也比什么都不做要好。
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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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Most of their work is carried out by unpaid volunteers.absol.:
来自Times Educational Supplement
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Hawke is currently an unpaid senior fellow at Civitas.
来自NEWYORKER