求翻译：沙发上的环形没有扣死，蛋卷沙发椅上有一道“裂缝”将它分为两部分，当你坐上去的时候，沙发会部分往下凹陷，而这剩下的保持原状的另一边则变身为扶手。是什么意思？

Ring failing to die on the sofa, egg rolls, together on the couch "cracks" separating it into two parts, when you sit on it, the sofa will sag down part, and the remaining intact on the other side into handrails.