目录Spring ORM（Object-Relational Mapping）作用核心组件使用步骤事务管理代码演示挑战总结Spring Transaction（Spring事务管理）事务的基本概念Spring事务管理的类型声明式事务管理事务的传播行为（Propagation）
I am working with a large list of points (each point has three dimensions x,y,z). I am pretty new with R, so I would like to know what is the best way to represent that kind of information.As far as
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