序的的英文：
proemial

Preface and Postscript to‘Rural Surveys’
《〈农村调查〉的序言和跋》

Stratigraphy studies the sequence of the rocks in the earth's crust.
地层学研究地壳中岩石的层序。

It is the particular sequence of the nucleotide blocks along the molecule that encodes the genetic information.
沿着分子核苷酸的特定序列为遗传信息编码。

Introductory part of a poem,etc
(诗等的)序

field sequential system
场序制,半帧序制

An ordinal (a cardinal) number
序(基)数

Preliminary remarks
序(文),前言

TO THE TAX-COLLECTORS AFTER THE BANDITS RETREAT
贼退示官吏并序

The preface gave an overview of the book’s contents.
序言对全书内容作了一个概述。

An introductory performance, event, or action preceding a more important one; a preliminary or preface.
序幕先于较重要部分的介绍性表演，事件或行动；开端或序