ad lib的用法和樣例：
例句
- The actress often forgot her lines but was very good at ad libbing.
那個女演員常忘台詞，卻極擅長臨時拼湊。 - 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。 - We were told to help ourselves to the food ad lib.
這些食物讓我們隨便吃。 - The actress often forgot her line but was very good at ad lib.
那個女演員常忘台詞，卻極擅長臨時拼湊。
