详细解释:n. 入鞘, 外层覆盖, 护套, 外包物, 盖板, 夹衬板, 覆材
英语解释：
名词 sheathing:
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同义词：overlay, overlayer