试纸

例句：

1. 1. We used a test paper to check the pH level of the solution.
   我们使用试纸来检查溶液的pH值。
2. 2. The doctor asked me to take a test paper to my home for analysis.
   医生让我带一张试纸回家进行分析。
3. 3. The teacher explained how to use a test paper to detect the presence of glucose in urine.
   老师解释了如何使用试纸检测尿液中的葡萄糖含量。