effective relief

例句：

1. 1. The new drug has been shown to be effective in treating chronic pain.
   新药已被证明对治疗慢性疼痛有效。
2. 2.The government's plan to improve public transportation is expected to provide effective relief for the city's congestion.
   政府计划改善公共交通，预计将有效缓解城市的拥堵问题。
3. 3. The surgeon used a surgical tool to perform an effective relief of the patient's pain.
   外科医生使用手术工具为病人进行了有效的疼痛缓解。