There is a continual exchange of calcium between blood serum and bone tissue.

血和骨组织之间，钙持续交换。

Rickets and Osteomalacia are usually diagnosed with lab tests which show abnormally low vitamin D levels in blood serum, low blood calcium, and elevated serum alkaline phosphatase.

实验室检查是诊断佝偻病和骨软化症的依据，包括血维生素D异，血钙、血磷酸酶升高。

Diagnosis of Measles is usually done via serology —looking for measles antibodies in blood serum, and the disease is usually most likely to occur among unvaccinated individuals.

通经过血学检测查找血中的麻疹抗体可诊断麻疹，并且该疾病最可能发生在未接种麻疹疫苗的人群中。

I heard you mentioned that one possibility might be treatments from the serum, the blood serum, of people who had had the disease and recovered.

CA：我听说你提到一种可能是用血治疗，血， 那些患有这种疾病并康复的人。