roofing

1. N-UNCOUNT Roofing is material used for making or covering roofs. 屋顶材料[oft N n]

A gust of wind pried loose a section of sheet-metal roofing. 一阵强风撬松了一部分金属板屋顶。

2. N-UNCOUNT Roofing is the work of putting new roofs on houses. 铺屋顶[oft N n]

...a roofing company. ...一家铺屋顶公司。