control pair

例句：

1. 1. Theresearchers divided the participants into control pairs andexperimental groups.
   研究人员将参与者分成了对照组和实验组。
2. 2. The study aimed to comparethe effectiveness of two different treatments for acommon disease.
   该研究旨在比较两种不同治疗方法对一种常见疾病的有效性。
3. 3. The controlpairs were given a placebo treatment whilethe experimental group received active medication.
   对照组接受了安慰剂治疗，而实验组接受了活性药物。