Campbell's method

例句：

1. 1. The Campbell method is widely used in the field of medicine.
   坎贝尔方法在医学领域广泛应用。
2. 2. The Campbell method has been proven to be effective in treating certain diseases.
   坎贝尔方法已被证明对某些疾病有效。
3. 3. The Campbell method involves a series of steps that are designed to improve patient outcomes.
   坎贝尔方法包括一系列旨在改善患者结果的步骤。