Calcaronea

例句：

1. 1. The mineral is found in the soil and can be used as a natural fertilizer.
   这种矿物存在于土壤中，可以作为天然肥料使用。
2. 2. The calcium oxalate crystals are commonly found in the urine of pregnant women.
   钙草酸晶体通常存在于孕妇的尿液中。
3. 3. The calcium oxalate crystals have been used to treat arthritis for centuries.
   钙草酸晶体自古以来就被用于治疗关节炎。