a positive reaction

• 阳性反应

a positive reaction的用法和样例：

例句

1. If the test is positive,it means that traces of forbidden drugs have been found.
   如检验呈阳性反应，就意味着发现了服有禁用药品的踪迹。
2. In some cases of nonspecific enteritis positive reactions were observed.
   在一些非特异性肠炎病例中，观察到阳性反应。