mat

垫, 丛, 衬边

a thick flat pad used as a floor covering; mounting consisting of a border or background for a picture; sports equipment consisting of a piece of thick padding on the floor for gymnastic sports; a mass that is densely tangled or interwoven

粗糙的, 无光泽的

纠缠在一起

铺席于...上, 使无光泽, 使缠结