3-way =您的数据与远程存储同步(loke CouchDB)4-way =您的数据与本地数据库(如localStorage或类似数据库)同步,并且该数据库与远程存储同步
来源https://docs.google.com/presentation/d/1NByDXl6YL6BJ6nL0G2DLyZs5Og2njE_MNJv6vNK5aoo/edit#slide=id.g34d447b28_10
