ultraviolet therapy

例句：

1. 1. This treatment isused to treat skin cancers that are resistant to conventional methods.
   这种治疗用于治疗对常规方法有抗性的皮肤癌。
2. 2.The patient was treated with ultraviolet therapy to improve his immune system.
   患者接受了紫外线疗法以增强其免疫系统。
3. 3. In recent years, ultraviolet therapy has been shown to be effective in treating various skin conditions.
   近年来，紫外线疗法已被证明在治疗各种皮肤疾病方面是有效的。