这篇论文提出了一种分布式数据库的形式化描述表示，如何将分布式数据库的全局操作变为局部操作。
The thesis suggests a kind of formalism of distributed database operations to present how to change the general operations into the local ones.
这些处理程序可以注册为全局、服务或操作作用域，并且最终的处理程序链将通过结合所有作用域的处理程序得出。
These handlers can be registered in global, service, or operation scope, and the final handler chain is calculated by combining the handlers from all the scopes.
首先，了解什么是全局变量以及它涉及的基本操作。
First, learn what global variables are and the basic operations that can be performed with them.
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