overlay
英 [??v?'le?]
美['ov?l?i]
- n. 覆蓋圖；覆蓋物
- vt. 在表面上鋪一薄層，鍍
英英釋意
- 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