名詞 ad lib:

1. remark made spontaneously without prior preparation
   同義詞：ad-lib

動詞 ad lib:

1. perform without preparation
   同義詞：improvise, improvize, ad-lib, extemporize, extemporise

形容詞 ad lib:

1. said or done without having been planned or written in advance
   同義詞：ad-lib, spontaneous, unwritten
2. with little or no preparation or forethought
   同義詞：ad-lib, extemporaneous, extemporary, extempore, impromptu, offhand, offhanded, off-the-cuff, unrehearsed

副詞 ad lib:

1. without advance preparation
   同義詞：ad libitum, spontaneously, impromptu

1. The actress often forgot her lines but was very good at ad libbing.
   那個女演員常忘臺詞，卻極擅長臨時拼湊。
2. I had forgotten to bring my notes and had to speak ad lib.
   我忘記帶講稿了，只好臨時講幾句。
3. We were told to help ourselves to the food ad lib.
   這些食物讓我們隨便吃。
4. The actress often forgot her line but was very good at ad lib.
   那個女演員常忘臺詞，卻極擅長臨時拼湊。