While many good tools for dealing with persistent data are available, they all involve a lot more work than simply manipulating an in-memory data structure.
虽然有许多处理数据持久性的好工具，但是它们需要的工作都比简单操纵内存中数据结构要多得多。
2
The data architecture area is intended to capture the structure of persistent databases.
数据体系结构区域用于捕获持久型数据库的结构。
3
Making a basic linked-list data structurepersistent is the easiest exercise; here, a list in Clojure is bound to a var named "a".