【求助】手册中这段话的意思？

xuguo1998

这段话好像较简单，但其意义老是不明，请大虾指教：
The user is responsible for ensuring that all gridpoints along adjoining primitives correspond to one
another. The use of reference points, with the command GENERATE point, during model creation can
be useful to make sure that the bounding brick is specified correctly for both primitives. Make sure
that the number of zones is correct and that the ratios used for the zone distribution are consistent.
Note that if the ratio for one primitive is going the opposite direction of the other, the inverse ratio
should be used for one of the primitives to ensure that boundary gridpoints match.

qinjianshe

网格生成中，如果通过“超”单元组合，注意相邻“超”单元面上结点重合问题，原理同有限单元法。