cecidium

例句：

1. 1. Ceridium is a rare and valuable mineral found in nature.
   铈是一种稀有且珍贵的矿物，存在于自然界中。
2. 2.The ceridium was used as a catalyst in the chemical industry.
   铈被用作化学工业中的催化剂。
3. 3.Ceridium has been found to have antibacterial properties.
   研究发现铈具有抗菌性质。