在元代，它形成了四折一楔子的固定体制。
In the Yuan Dynasty , Zaju formed a fixing system that contained four scenes and a fragment .
经分析，本文选取四折一楔子、一角独唱和剧曲作为讨论对象。
By analysis , the text choose ' " Four Folds One Wedge ", " One Character Soloing ", " Songs And Words " as the discussing object .
四折一楔子