gypsum roof plank

例句：

1. 1.The wooden beams on the roof are made of gypsum.
   屋顶上的木梁是用石膏制成的。
2. 2. The house was built using gypsum roof planks.
   这所房子是用石膏瓦片建造的。
3. 3.The builders used gypsum roof planks to insulate the walls.
   建筑工人使用石膏瓦片来隔热墙壁。