purgation by drugs of lubricant nature

例句：

1. 1.The process of purgation is essential for maintaining good health.
   净化过程对于保持健康至关重要。
2. 2. During the purgation period, patients are advised to avoid certain foods.
   在净化期间，患者被建议避免某些食物。
3. 3. The purgation method has been shown to be effective in treating certain digestive disorders.
   净化方法已被证明对治疗某些消化紊乱有效。