Widal reaction

例句：

1. 1. The Widal reaction is a test that measures the body's ability to produce antibodies against a specific antigen.
   瓦迪反应是一种测试，用于测量身体产生针对特定抗原的抗体的能力。
2. 2. In the Widal reaction, the patient's blood is mixed with a solution of dye and then tested for the presence of antibodies.
   在瓦迪反应中，患者的血液与染料溶液混合后进行抗体检测。
3. 3. The Widal reaction was used to diagnose syphilis in the early 20th century.
   瓦迪反应在20世纪初被用来诊断梅毒。