Other models exist that are hybrids of these three, such as delayed open-access, where journals allow only subscribers to read a paper for the first six months, before making it freely available to everyone who wishes to see it.
其他的模式都是对这三种的不同组合,比如延期开放式是指某一些期刊
发表文章的前六个月只允许付费阅览,此后转为免费阅读。