an introduction to a book or a written document; an introduction to something you say 序言;導言;前言;開場白 - in a preamble
The aims of the treaty are stated in its preamble. 條約的宗旨已在序言中說明。 - preamble to something
the Preamble to the US Constitution 美國憲法序言 - without preamble
She gave him the bad news without preamble. 她開門見山地把壞消息告訴了他。
Word Originlate Middle English: from Old French preambule, from medieval Latin praeambulum, from late Latin praeambulus ‘going before’.- in a preamble