there is no known_treatment__for this disease but it can be__cured__
treat:治疗
treatment:治疗方法
cure:治愈能分析一下么There is no known treatment for this disease but it can be cured.There is: there be的现在式单数形式，表示“存在”、“有”，there is no意思是“没有”known: know的过去分词作形容词用，意思是已知的treatment for this disease: 注意treatment 后用介词for 搭配but itcan be cured: 是第二句句子，用连词BUT连接。