hard-burnt brick

例句：

1. 1.The hard-burnt bricks were used to build the walls of the house.
   这些硬烧砖被用来建造房子的墙壁。
2. 2.The hard-burnt bricks are resistant to fire and water.
   这种硬烧砖具有防火和防水的特性。
3. 3.The old building was renovated with new hard-burnt bricks.
   这座老建筑被新硬烧砖翻新了。