congo-red test paper

例句：

1. 1. This is the congo-red test paper we need for the experiment.
   这是我们实验需要的刚果红测试纸。
2. 2.The teacher used the congo-red test paper to check the students' knowledge.
   老师用刚果红测试纸检查学生们的知识。
3. 3. The congo-red test paper was used to detect the presence of bacteria in the sample.
   刚果红测试纸被用来检测样本中细菌的存在。