1、即兴台词
演出时，表演人员忽然冒出不在剧本的上对白，叫做即兴台词（AD LIB）。
2、即兴而作
... the room. 老师一离开教室，孩子们就闹起来了。 ad lib 即兴而作，随口编 The comedian ad libbed most of his routine. 那个喜剧演员大多是 ...
3、随意
... ARLS 听（音）反射潜伏期试验 ad lib. 随意 PDT 太平洋地区日用时 ...
4、没有限制地
... 没有限制地 ad lib 录制声音没有限制 Record Voice Without Limitation 市场没有限制 Markets Impose No Restrictions ...
ad lib [ ,æd'lib ]
n.remark made spontaneously without prior preparation 同义词：ad-lib
v.perform without preparation 同义词：improviseimprovizead-libextemporizeextemporise
adj. said or done without having been planned or written in advance 同义词：ad-libspontaneousunwritten
with little or no preparation or forethought 同义词：ad-libextemporaneousextemporaryextemporeimpromptuoffhandoffhandedoff-the-cuffunrehearsed
adv.without advance preparation 同义词：ad libitumspontaneouslyimpromptu