求一段汉翻英,在癌症的临床治疗中,手术、放疗及化疗是三种最主要的治疗方法,其中放疗因其适应症比较宽泛,选择性较大,70%

Surgical operation, radiotherapy and chemotherapy are the three major methods for clinical treatment of cancer, among which the radiotherapy, for (或because of; due to) its wide indications and selectivity, will be applied to more than 70% of malignancy patients at a certain stage of their treatment。