experimenter

例句：

1. 1.The scientist conducted an experiment to test the hypothesis.
   这位科学家进行了一个实验来测试这个假设。
2. 2. The teacher is an excellent experimenter who can guide students in their learning.
   这位老师是一位优秀的实验者，能够指导学生学习。
3. 3. The experimenter carefully recorded all the data collected during the study.
   实验者仔细记录了在研究中收集的所有数据。