It's the board that you're playing can fold and unfold and refold in all sorts of different ways.

棋盘可以以各种不同方式叠、展开和叠。

" At school needlework was pretty much the only thing I was any good at." I smoothed out the creases on my lap and prepared to refold a jacket.

针线活几乎是唯一擅长。 ” 抚平膝盖上痕， 准备重新叠一件夹克。