ad-lib (also ad lib) ( ad-libbing, ad-libbed, ad-libs )

• 1. 

  V-T If you ad-lib something in a play or a speech, you say something that has not been planned or written beforehand. 即兴穿插

  例：

  He began comically ad-libbing a script.

  他开始即兴穿插一段剧本了。

  例：

  ...ad-libbed phrases.

  …即兴的乐句。

• 2. 

  N-COUNT An ad-lib is something that is said without having been planned or written beforehand. 即兴穿插的内容

  例：

  Every time I fluffed a line Lenny got me out of trouble with a brilliant ad-lib.

  每当我忘记台词的时候，伦尼都会即兴地补上很好的一段替我解围。

• 3. 

  ADV Ad lib is also an adverb. 即兴 [ADV after v]

  例：

  I spoke from the pulpit ad lib.

  我在讲坛上做了即兴发言。