fenetylline

例句：

1. 1. The patient was given a dose of fenetylline to relieve his pain.
   患者被给予一定剂量的芬太尼以缓解他的疼痛。
2. 2. The research team discovered that fenetylline could be used as an effective painkiller.
   研究团队发现芬太尼可以作为一种有效的止痛药。
3. 3. The patient's condition improved significantly after receiving fenetylline treatment.
   经过芬太尼治疗，患者的病情明显好转。