据说主干处理所有更高级别的抽象，而jQuery或类似的库处理DOM、规范化事件等等..
有人能用简单的实例来帮助我理解这句话吗.
Also one important feature of MVC framework like Backbone, Knockout is that it keeps the model (data) and the view in sync. But this seems to be specific at a page-level and not across the entire application. So can we have the model/data and the view synced across multiple pages..(kind of global)
主干/淘汰通常用于单页应用程序.因此，虽然jQuery是一个工具箱，可以用于任何网页，但主干是针对特定类型的应用程序的，可以帮助您组织代码.至少在我的经验中，构建单页应用程序的最大挑战之一是保持代码干净和模块化，主干网在这方面有很大帮助.
The characteristics of a typical backbone app are:
关于你关于在多个页面上保持数据同步的问题，我本能的回答是，你不需要多个页面:用户可能会感觉到页面正在更改，url栏中的地址会因pushState功能而更改，但从技术上讲，整个应用程序是一个页面.
The biggest advantages of this kind of approach are a smooth user experience (no reloading pages), good caching support as everything except the json data is static content, for mobile targets the possibility to turn the web app into a mobile app with phoneGap (because everything except json is static).