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

像吗啡和待因这样的鸦片制剂是抑制剧痛必不少的。

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

阿片类以是天然存在的，例吗啡待因，也以是合成的，例尼美沙酮。

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

一些常见的麻醉剂和阿片类包括海洛因、吗啡、待因、美沙酮、氢酮（称为维柯丁洛塔布）和羟考酮（也称为止痛）。

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 是鳄鱼地尔的活性成分，它是通过将待因溶解在强溶剂中制成的，然后通过一系列简单但危险的反应生成迅速溶解在身体组织中的待因盐。