If something is overlaid with a feeling or quality, that feeling or quality is the most noticeable one, but there may be deeper and more important ones involved.
An overlay of wood covers the brick wall.砖墙上覆盖了一层木板。
套图透明膜;上衬
英英词典释义
Noun
1. 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