smectites

例句：

1. 1. The mineral smectites is used in the production of plaster.
   矿物石盐用于生产石膏。
2. 2. The smectites are a natural resource that can be found in many different environments.
   石盐是一种天然资源，可以在许多不同的环境中找到。
3. 3. The smectites were extracted from the ground and then processed into various products.
   石盐从地下提取出来，然后加工成各种产品。