tannic acid test

例句：

1. 1. The doctor performed a tannicacid test on the patient to determine thecause of his illness.
   医生对病人进行了鞣酸试验，以确定他疾病的起因。
2. 2. The tannic acid test is usedto detect the presence of iron in theblood.
   鞣酸试验用于检测血液中的铁含量。
3. 3. During the tannic acid test,the patient's urine was testedfor the presence of iron.
   在鞣酸试验期间，患者的尿液被测试以检测铁的存在。