在那个时代，奎宁是唯一可以用来治疗疟疾的药物。
At the time, quinine was the only viable medical treatment for malaria.
吡喹酮是唯一可用于治疗各种类型血吸虫病的药物。
Praziquantel is the only available treatment against all forms of schistosomiasis.
千百年来，草药是减轻病痛和治疗疾病的唯一药物。
For millennia, herbal remedies were the only medicines available to help soothe aches and pains, and treat illnesses.
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