Researchers have stumbled across a drug that may help patients with Parkinson's disease.研究人员偶然发现了一种药物，也许可以治疗帕金森病。Clinical depression is a treatable illness.临床抑郁症是一种可以治疗的疾病。He was hoping for a cure from his debilitating illness.他希望有一种方法可以治疗使他日渐虚弱的疾病。Her condition is treatable.她的病情是可以治疗的。