positive-ray method

例句：

1. 1.This technique is often used in medical imaging to detect tumors.
   这种方法常用于医学成像，以检测肿瘤。
2. 2. The positive-ray method has been shown to be effective in treating certain cancers.
   阳性射线法已被证明对治疗某些癌症有效。
3. 3.In this study, we applied the positive-ray method to analyze the molecular structure of a new drug candidate.
   在这项研究中，我们应用了阳性射线法来分析新药候选分子的结构。