他 / 发现 / 旧 / 桌球拍 / 的 / 胶皮 / 已经 / 磨损 / 决定 / 换 / 一支 / 新的他发现旧桌球拍的胶皮已经磨损,决定换一支新的。He noticed that the rubber on his old table tennis racket was worn out, so he decided to get a new one.