CST MWS中3D Scalar plot 中的plot inside field 和plot outside field分别代表什么意思，有什么区别呢？

我是新手，在用CST仿真中遇到些问题，希望各位朋友帮助解决：CST MWS中3D Scalar plot 中的plot inside field 和plot outside field分别代表什么意思，有什么区别?

帮助文件里有解释。
CST MWS帮助文件《3D Scalar Plot》。

Inside/outside frame
Note: This frame is only available with tetrahedral meshes.
Since every triangle is connected to two tetrahedrons, you can choose a surface plot of a structure to be calculated by taking into account the tetrahedrons lying either on the inside or outside surface of  the structure.
Plot inside field: For calculation use the tetrahedrons bordering the structure surface on the inside.
Plot outside field: For calculation use the tetrahedrons bordering the structure surface on the outside.

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