calcium oxalate stone

例句：

1. 1.He had a calcium oxalate stone in his lower back that required surgery.
   他的下背部有一个钙草酸石，需要手术。
2. 2. The doctor advised him to take calcium supplements to help prevent calcium oxalate stones.
   医生建议他服用钙补充剂来预防钙草酸石。
3. 3.She was diagnosed with calcium oxalate stones and needed to follow a strict diet.
   她被诊断出患有钙草酸石，需要遵循严格的饮食。