是否可以在Angularjs形式中使用双数组？

I've recently been using Angularjs in my project. I'm trying to create a dynamic form which enables users to create crossword puzzle questions. I was thinking of using angularjs to allow users to add additional rows and columns into their answers. In my form, I've created an input called "answer" which has 2 child element row and column, and "column" has it's own child element as well. This is what I have done so far:I've recently been using Angularjs in my projec