serous secretion

例句：

1. 1. The patient's blood pressure was elevated due to a serous secretion in the brain.
   患者的血压升高是由于大脑中的一种严重分泌。
2. 2.The doctor prescribed an antibiotic for the patient's serous secretion infection.
   医生为患者的严重分泌感染开了抗生素。
3. 3. The researcher found that the serous secretion of the bacteria could be used as a biomarker for disease diagnosis.
   研究者发现，这种细菌的严重分泌可以用作疾病诊断的生物标志物。