e.g. He was forced to ad-lib his answers because he hadn't expected their questions.
e.g. The musician gave an ad-lib performance at the audience's request.
e.g. The politician addressed the crowd ad-lib to answer their questions.
e.g. In jazz music, musicians can often play ad-lib, deviating in rhythm for some time before eventually rejoining the group. We can change the schedule ad-lib based on how much time we have.
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