morphine-like substance

例句：

1. 1. The patient was givena morphine-like substance tohelp him sleep.
   病人被给予一种吗啡样物质以帮助他入睡。
2. 2. Theresearcher found that the morphine-like substance could be used as analternative pain reliever.
   研究人员发现，这种吗啡样物质可以作为替代的止痛药。
3. 3. The doctor prescribed a morphine-like substance for the patient's chronic pain.
   医生为患者开具了含有吗啡成分的药物来缓解其慢性疼痛。