procedures of observation

例句：

1. 1. The research team conducted rigorous observation procedures to gather data.
   研究小组执行了严格的观察程序以收集数据。
2. 2.The scientist used a microscope to observe the microscopic structure of the sample.
   科学家使用显微镜来观察样本的微观结构。
3. 3. During the experiment, the teacher observed the students' performance and made necessary adjustments.
   在实验中，老师观察了学生们的表现并做出了必要的调整。