And, the drug in question is a hard drug like cocaine and heroin.

而且， 有问题的毒品是一种像可卡因和海洛因这样的硬毒品。

Usually, we use this word in talking about someone who has a serious drug addiction, a serious drug problem with hardcore drugs such as cocaine and heroin.

通常，我们用这个词来谈论有严重毒瘾的人，严重的毒品问题， 如可卡因和海洛因。

They can be very useful in treating certain pains, but, according to a 2011 press release from the CDC, prescription painkiller overdoses kill more people than cocaine and heroin combined.

它们在治疗某些疼痛方面非常有用， 但根据疾病预防控制中心 2011 年的一份新闻稿，处方止痛药过量导致的死亡人数超过可卡因和海洛因的总和。