1.Opiates like morphine and codeine are essential for treating severe pain.

像吗啡可待因这样的鸦片抑剧痛必不可少的药物。

2.Opioid drugs can be naturally occurring, such as morphine or codeine, or synthetic, such as fentanyl or methadone.

片类药物可以天然存在的，例如吗啡可待因，也可以合成的，例如芬太尼美沙酮。机翻

3.A few common opiates and opioids include heroin, morphine, codeine, methadone, hydrocodone (known as Vicodin or Lortab) and oxycodone (otherwise known as Percocet) .

一些常见的麻醉片类药物包括海洛因、吗啡、可待因、美沙酮、氢可酮（称为维柯丁洛塔布）羟考酮（也称为止痛药）。

4.Desomorphine, the active ingredient krokodil, is made by dissolving codeine in powerful solvents, and then running it through a bunch of a simple but dangerous reactions to create codeine salts that quickly dissolve in body tissues.

Desomorphine 鳄鱼地尔的活性成分，它通过将可待因溶解在强溶中成的，然后通过一系列简单但危险的反应生成可迅速溶解在身体组织中的可待因盐。机翻