positive-ray analysis

例句：

1. 1. In this study, we used the positive-ray analysis to detect the brain activity during sleep.
   在这项研究中，我们使用正射线分析来检测睡眠期间的大脑活动。
2. 2. The positive-ray analysis revealed that the patient had a high level of stress.
   正射线分析显示，患者处于高度压力状态。
3. 3. The positive-ray analysis is a powerful tool for studying the brain's functions.
   正射线分析是一种强大的工具，用于研究大脑的功能。