roofing
n. 屋顶；盖屋顶；屋顶盖法
adj. 屋顶用的
v. 给……盖上顶；遮蔽（roof 的 ing 形式）
例句
The young trees were used as supports for lodgings, with the waterproof bark used as roofing.
年轻的树木被用作住所的支柱，防水的树皮被用作屋顶。
Other indicators, such as sales of roofing material, point to busier economic activity.
其他的指标，例如屋顶建材的销售，也指向更繁忙的经济活动。
Utility knife: Great for cutting vinyl floor-ing, roofing shingles and building materials.
工具刀：用于切割乙烯塑料地板材料，屋面瓦和建筑材料。
