roof clay

例句：

1. 1. The builders were using roof clay to waterproof the walls.
   建筑工人正在使用屋顶泥来防水墙壁。
2. 2. The old house needed a coat of roof clay to restore its appearance.
   这所旧房子需要涂上一层屋顶泥来恢复其外观。
3. 3. The builders used roof clay to create a beautiful mosaic pattern on the roof.
   建筑工人用屋顶泥在屋顶上创造了一个美丽的马赛克图案。