A chain is a special handler that represents a sequence of other handlers.

链是一个特殊的处理程序，它代表了其他处理程序的顺序。

youdao

A sequence of extension generators or extension handlers is referred to as an extension chain.

扩展生成器或扩展处理程序的序列称为扩展链。

youdao

This example creates a single chain to render a resume XML document, resume.xml, into an HTML page through a sequence of three stylesheet transformations.

本例创建了一个呈现简历xml文档resume . xml的单个链，依次应用三个样式表转换，将resume . xml转换为一个html页面。

youdao

It's a sequence of events, an inexorable chain reaction where each small link is fundamental, like a snake of upended dominoes.

NPR: Excerpt: 'The Sister'

In general terms, a change in your genome sequence can mean a small alteration, like removing or adding a single link in a chain, or it can mean a structural change involving bigger chunks, like removing or adding whole sections of the chain.

FORBES: Autism And Genetics: It's Complicated

One example is the polymerase chain reaction (PCR), a standard technique which employs enzymes to churn out millions of copies of a DNA sequence and involves cycles of gentle heating and cooling.

ECONOMIST: Acoustic microfluidics