“等值面”的英语可以翻译为：contour plane，isosurface ...

为束缚住轨道的大小, 我们取一等值面.To pin down the size of an orbital, we take a contour surface.参数辨识问题,是以等值面边值问题为正问题的一类反问题.Parameter identification problem is a class of inverse problem of equivalued surface problem....