serum copper oxidase activity

例句：

1. 1.The researchers found that the serum copper oxidase activity was significantly reduced in the patients with diabetes.
   研究人员发现，糖尿病患者的血清铜氧化酶活性显著降低。
2. 2.The study aimed to investigate the serum copper oxidase activity in relation to the development of diabetic retinopathy.
   该研究旨在调查血清铜氧化酶活性与糖尿病视网膜病变的发展之间的关系。
3. 3.The results showed that the serum copper oxidase activity was negatively correlated with the severity of diabetic nephropathy.
   结果显示，血清铜氧化酶活性与糖尿病肾病的严重程度呈负相关。