An auspicious prologue or opening act, often a short story told to set a positive tone or bring good luck before a main performance.
每次演出前，他都喜欢讲一个简短的趣事作为得胜头回，以此调动气氛，也图个吉利。
Before every performance, he likes to tell a short amusing anecdote as an auspicious prologue, both to liven up the atmosphere and for good luck.
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