NHibernate addresses the well-known problem that object persistence code is a pain in the neck to develop.
By relieving you of the chore of writing persistence code, NHibernate enables you to keep your focus on your business model, where it belongs.
This mismatch is intentional. One of the aspects of NHibernate that we want to show is that there need not be a one-to-one correspondence between classes and database tables.
NHibernate目的是解決一個衆所周知的問題，對象持久代碼在開發過程中的瓶頸問題。
一旦你爲你的類創建了映*檔案，就可以忘記你的持久層，而且你也不用花費幾天時間或是幾周來編寫一個累贅的持久層，才知道NHibernate這麼多好處。
這裏的不匹配並不是故意的，我們想展示的NHibernate其中的一個概念就是這裏並不需要數據庫中的表跟類是一一對應的。
