1、Seroreaction is a medical test used to detect the presence of antibodies in the blood.
血清反应是一种用于检测血液中抗体存在的医学测试。

2、The seroreaction showed a positive result, indicating that the person has been exposed to the virus.
血清学反应显示出阳性结果，说明这个人已经接触过病毒。