compare — used to direct a reader to another idea, document, etc.用于引导参考另一观点或材料
This article takes a new approach to the problems of today's inner cities. (Cf Smith's earlier article on the topic.)这篇文章对现今内城区的各种问题提出了新的解决方法。（比较：史密斯有关这一话题的早期文章。）
◊ Cf comes from the Latin conferre, which means “to compare.”*cf源自拉丁语conferre，意为to compare。