1、Integrate a great many grammar points and the relevant detailed examle words or sentences to completely master the noun, including its plural form and possessive case, and some other grammar points of it.
2、Provide users with a great many editable exercises with Chinese meanings and detailed explanations, and an accessible way to maintain them, including adding, deleting,editing and query.
3、Fully allow users to have their own comments on every grammar point and access them easily.