当时，他们还无法治愈这种疾病。

At the time, they couldn't ___cure the disease.

被稀释的药物对治疗脑膜炎毫无用处。

The watered-down medicine was useless for ___curing the meningitis.

医生们希望很快能找到治愈这种罕见病症的方法。

Doctors hope to soon find a way to ___cure this rare condition.