单词：overlays
v. 把一物置于…之上；覆盖；镶；遮掩（overlay的三单形式）
n protective covering consisting, for example, of a layer of boards applied to the studs and joists of a building to strengthen it and serve as a foundation for a weatherproof exterior
n a layer of decorative material (such as gold leaf or wood veneer) applied over a surface
v put something on top of something else
v kill by lying on
n a layer of decorative material (such as gold leaf or wood veneer) applied over a surface
v put something on top of something else
v kill by lying on