名词
中文翻译：序言
同义词：
['introduction', 'preface例句：1. The speaker began with an exordium before delivering the main speech.（演讲者在发表主旨演讲之前，先进行了开场白。）']
例句：
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1. The speaker began with an exordium before delivering the main speech.
演讲者在发表主旨演讲之前，先进行了开场白。
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2. The program's opening was a brief exordium followed by the main event.
节目的开场是一段简短的开场白，紧接着是主要活动。
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3. The author's book begins with an exordium that sets the tone for the rest of the narrative.
作者的书以一个开场白开始，为整本书定下了基调。