He began comically ad-libbing a script.

他开始即兴穿插一段剧本了。

She abandoned her script and began ad-libbing.

她抛开脚本即兴表演起来。

The actress often forgot her lines but was very good at ad libbing.

那个女演员常忘台词， 却极擅长临时拼凑。

The actress often forgot her lines but was very good at ad libbing.

那个女演员常忘台词，却极擅长临时拼凑。