The reason being that。这的being that是啥东西？代表啥？

Question

如题所述

Answer 1

that即是reason，这句意思差不多就是because of that。
类似结构的句子比如：
"I put A, and I was wrong, the correct answer being B."
"We couldn't fix it, the problem being we didn't have the tools."
"His mother read to him from an early age,the idea being that he would speak sooner".

后边这个分句是修饰前边的主句的，题主说的这个分句，意思就是说明前边主句所述事项的原因。being that是定义、说明reason的。

Answer 2

独立主格结构 (买本语法书看看，帮助非常大）。