“Ex post facto”本身表示“事后的”。比如：①ex-post facto interview 事后面试，②ex post facto approvals 事后批准，③ex post facto agreement 事后协议，④ex post facto review 事后审查，⑤ex post facto case事后个案

在英美法中，则有【ex post facto law】这一术语，翻译为“事后法、有溯及力的法律”。指在某一事实发生或某一行为完成之后制定的、能够适用于该事实或行为并改变其法律后果或者法律关系的法律。在美国，联邦宪法禁止国会和各州通过有溯及力的法律。

参考双语例句：

The Administration further notes that, although the Board indicated an increase of 48 per cent in both the number and dollar value of ex post facto cases, the actual number of cases is only 15 per cent of the total number of cases reviewed by the Headquarters Committee on Contracts, and the value is only 6.4 per cent of the total value reviewed.

行政当局进一步指出，虽然审计委员会指出“事后审查个案”在数目和美元价值上都增加了48%，但实际案件数只占总部合同委员会审查的总案件数的15%，价值只占总价值的6.4%。

In this connection, the Committee recalls that, in its report on United Nations peacekeeping operations for the period ended 30 June 2011 (A/66/5 (Vol. II)), the Board of Auditors expressed its concern with regard to the use of the ex post facto approvals and other means of performing procurement outside of the normal procedures, emphasizing that ex post facto approvals should be used only in rare exceptions.

在这方面，行预咨委会回顾，审计委员会在其关于2011年6月31日终了的期间联合国维持和平行动的报告(A/66/5(Vol.II))中对使用事后批准以及其他不符合正常程序的采购手段表示关切，强调只有在极少数特殊情况下才能采用事后批准的做法。

The Board noted that the request for award of the individual contractor agreement amendment was completed but it did not indicate whether this was a retroactive/ex post facto agreement.

审计委员会指出，已经完成了对批准个体订约人协议订正的请求，但没有表明这是否是一份补订/事后协议。

The weighting should be clearly specified at the time of the invitation to tender, in order to improve the transparency of the procedures for the candidates and to ensure that ex post facto oversight is effective.

从招标一开始，选择的过程就必须明确清晰，以增加竞标者参与程序的透明度，以及提高事后监控的效率。