{u,v,w}/.u→v/.v→z? {w,z,w}{z,z,w}{w,w,z}{z,w,w} {u,v,w}/.u→v/.v→z? {w,z,w}{z,z,w}{w,w,z}{z,w,w} 发布时间:2025-09-24 17:44:53