semifreestone

例句：

1. 1. The building'sexterior is made of semifreestone.
   这座建筑的外墙是由半自由石料制成的。
2. 2. The architect wanted to use semifreestone for the facade.
   建筑师想用半自由石料来装饰立面。
3. 3.The stone was chosen because it was asemifreestone.
   选择这种石头是因为它是半自由石料。