preamble
noun /ˈpriːæmbl/
/ˈpriːæmbl/
[countable, uncountable] (formal)- an introduction to a book or a written document; an introduction to something you say
序言；导言；前言；开场白 - in a preamble The aims of the treaty are stated in its preamble.
条约的宗旨已在序言中说明。 - preamble to something the Preamble to the US Constitution
美国宪法序言 - without preamble She gave him the bad news without preamble.
她开门见山地把坏消息告诉了他。
词源late Middle English: from Old French preambule, from medieval Latin praeambulum, from late Latin praeambulus ‘going before’. - in a preamble The aims of the treaty are stated in its preamble.