The disease has an unpredictable course with exacerbations and spontaneous remissions.
目前该病的进程难以预计，病情可逐渐恶化或自发性缓解。
Their disease is likely to respond poorly to therapy and their remissions will be short.
他们的病可能难于治疗并且缓解程度较低。
Their disease is likely to respond poorly to therapy and their remissions will be short.
他们的病可能难于治疗并且缓解程度较低。
应用推荐