在这个最简单的发布方案中只有两台服务器，我们在其间移动规则。
In the simplest publishing scenario, there are two servers between which you want to move rules.
抽取的表面类型由移动规则函数决定，可以是场变量的任意函数。
The displacement criterion which can be any function of the available field variables determines the type of surface.
该方法的缺点是，它只能移动规则本身和注册的列，不能移动与它们相关的元数据(例如，执行历史)。
The drawback of this approach is that it only moves the rules themselves and registered columns, but not the metadata associated with them (for example, the execution history).
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