thallium sulfate

例句：

1. 1. The chemical was used to treat cancer patients.
   这种化学被用来治疗癌症患者。
2. 2. The doctor prescribed the medication for her.
   医生给她开了这种药。
3. 3. The patient took the medicine every day as directed.
   患者按照医嘱每天服用这种药。