arsenicum

例句：

1. 1. The doctor prescribed arsenic to treat his patient's cancer.
   医生给病人开了砷来治疗他的癌症。
2. 2. Arsenic is highly toxic and can cause serious health problems.
   砷非常有毒，可能导致严重的健康问题。
3. 3.The chemist warned the patient about the dangers of arsenic in their medicine.
   药剂师警告病人他们的药物中砷的危险。