ad hoc
adj, adv (Latin 拉)
1 (made or arranged) for a particular purpose only; special(ly) 仅为某一目的(而做或安排)(的); 特别(的)
appoint an ad hoc committee to deal with the affair 指定一特别委员会处理此事.
2 (in a way that is) not planned in advance; informal(ly) 非事先计划(的); 非正式(的)
Problems were solved on an ad hoc basis. 做了一些变通问题便解决了.
Points of policy are decided ad hoc. 政策的条款是临时决定的.