向老师们请教下面这个句子的语法结构：

And by their affections are meant the only ones they are allowed to have——those to the men with whom they are connected, or to the children who constitute an additional and indefeasible tie between them and a man.

主要是红色这个部分不太清楚是什么语法结构，是一种倒装吗？

个人的思考是，原来的语序是“the only ones they are allowed to have are meant by their affections”，因为ones不适合出现在affections前面，句末又有一个长的解释，所以倒装了。

谢谢各位老师！