N-VAR
序文；導言；開場白
A preamble is an introduction that comes before something you say or write.
例句
The controversy has arisen over the text of the preamble to the unification treaty...
針對統一條約的序文出現了爭論。
'I would like you to return to the villa as soon as possible,' she said without preamble.
她開門見山地說：“我想讓你盡快回到別墅。”