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

清和骨组织之间，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依据，包括清维生素D异常低，钙低、清碱性磷酸酶升高。

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.

通常清学检测查找清中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性是用清治疗，清， 那些患有这种疾病并康复人。