这一篇是在说明Push Technology
这一句我翻得不通顺
Push technology, or server push, describes a style of Internet-based communication where the request for a given transaction is initiated by the publisher or central server.
或称server push 描述以互联网为基础,由发布者或中央服务器发起交易的请求的一种通讯种类
It is contrasted with pull/get, where the request for the transmission of information is initiated by the receiver or client.
它被拿来与pull或get比较，由接收者或客户端发出传输资讯的请求
express in advance 不知道如何翻译
Push services are often based on information preferences expressed in advance.
Push服务通常基于资讯偏爱
麻烦给我一些建议 谢谢 ^_^