pathological grading

例句：

1. 1.The pathologist graded the tissue samples according to their severity.
   病理学家根据样本的严重程度对其进行了分级。
2. 2. The study focused on the pathological grading of cancer cells.
   该研究专注于癌症细胞的病理分级。
3. 3.Pathologists use this method to grade the severity of diseases in humans.
   病理学家使用这种方法来对人类疾病进行严重程度分级。