lecithid

例句：

1. 1. The limestone quarry is located in the mountains.
   石灰石采石场位于山区。
2. 2.The limestone formation has been studied for its potential as a building material.
   石灰岩层已被研究，以作为建筑材料的潜力。
3. 3.The limestone caves are home to many species of colorful insects.
   石灰岩洞穴是许多多彩昆虫的家园。