portlandite

例句：

1. 1.The Portlandite is a type of limestone that is commonly used in construction.
   波特兰石是一种常见的用于建筑的石灰岩。
2. 2. The Portlandite was found in the area where the building was constructed.
   波特兰石在建筑物建造的区域被发现。
3. 3.The Portlandite was used as a building material because it is strong and durable.
   波特兰石被用作建筑材料，因为它既坚固又耐用。