hirudin

例句：

1. 1. The patientwas given a dose of hirudin to help him sleep.
   给病人开了一剂海洛因让他睡觉。
2. 2. The researcher discovered that hirudin couldbe used as an alternative treatment for addiction.
   研究者发现海洛因可以作为替代治疗用于成瘾。
3. 3. The drug hirudinis highly addictive and can cause severewithdrawal symptoms.
   这种药物海洛因高度上瘾，会导致严重的戒断症状。