序幕

1. 前言引言或序幕，如文学作品的前言，尤指早期英国剧作的序幕
   A preface or prologue, as to a literary composition, especially an early English play.
2. 签定这一协议是两国关系加强的序幕。
   The signing of the agreement was a prologue to better relations between the two countries.

序的英语翻译：

幕的英语翻译：