vt. 在…上铺或盖 overlaid, overlaid, overlaying, overlays.n. 覆盖物,涂盖层
拆分: over-在上 + lay铺设
例:vt. A carpet overlays the wood floor. 地板上铺了一条地毯。 n. An overlay of wood covers the brick wall. 砖墙上覆盖了一层木板。