前説
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Meanings
1
warm-up; pre-show talk
Entertainment-industry term for the warm-up talk or performance given to the audience before the main act or TV recording begins, often by a comedian or announcer.
Before the recording, they warm up the audience with a pre-show talk.
2
General sense of an introductory talk or explanation, similar to a prologue. Less common than the entertainment-specific sense.
In the introduction to the lecture, they explained the background of the theme.