ad hoc 在《元照英美法词典》中给出的中文是“为此”，是指为了特定目的。根据不同的语境可译为“特设”“专设”“临时”等，一般用法为ad hoc + n.，可以简单理解为形容词。
如
ad hoc arbitration 特别仲裁；专项仲裁
ad hoc court 特设法院/法庭
ad hoc judge 专案法官
具体用法可参考如下双语例句：
In this connection, the Committee notes that, as indicated in paragraph I.52 (a) above, the Secretary-General is proposing the redeployment of one P-4 post from the Disarmament and Peace Affairs Branch (subprogramme 1) to the Central Planning and Coordination Service (subprogramme 2) in New York in order to formally establish the training coordination function, which has hitherto existed on an ad hoc basis.
在这一方面，咨询委员会注意到，如上文第一.52(a)段所述， 秘书长提出将纽约裁军与和平事务处(次级方案 1)的 1 个 P-4 员额调到中央规划 和协调处(次级方案 2)，以正式设立培训协调职能，在此之前这一职能一直 属于 特设性质。
In consultation with Member States, efforts will be made to enhance the interaction of ADGs of Major Programmes with the Executive Board and its Ad Hoc Group on the broad range of issues related to the programme and management of their MP: programme implementation, results, impact, evaluation and audits, trends and challenges, structures and cost efficiency, especially in the context of the discussion of EX/4 and C/3 documents.
与会员国磋商，努力加强各重大计划部门助理总干事与执行局及其特设工作组就计划和重大计划管理方面广泛的问题开展互动：计划的实施、结果、影响、评价与审计、趋势与 挑战、结构和成本效率等，尤其是在讨论 EX/4 和 C/3 文件的大背景下。
In order to eradicate informal market, in particular in the agriculture and building sectors – being areas with the highest percentage of migrants –, Italy has recently adopted an ad hoc inspection plan.
为了取缔非正式市场，尤其是农业和建筑部门的非正式市场――即移徙工人 百分比最高的领域，意大利最近通过了一项临时性的检查计划。
转载自：旗渡译问网站 作者：旗渡多语信息中心（出海资讯定制）
