supplementary therapy

例句：

1. 1.The supplementary information provided by the textbook is very helpful for understanding the material.
   课本提供的补充信息对理解材料非常有帮助。
2. 2.The teacher added some supplementary exercises to reinforce the lesson.
   老师添加了一些补充练习来巩固课程内容。
3. 3. The company offers a variety of supplements to its customers to improve their health.
   该公司向其客户提供多种补充品，以改善他们的健康。