单词hard drug
na.: 〈口〉成瘾毒品
网络: 易上瘾的毒品；毒瘾
硬性毒品（容易成瘾）:
a powerful illegal drug, such as heroin , that some people take for pleasure and can become addicted to
〔口语〕成瘾毒品,麻醉品〔指一切能使人上瘾的和极有害于身心的毒品,如海洛因或古柯碱〕
Will the most troubling kind of hard drug use increase again in response?
那么最令人担心的硬性毒品使用会不会相应增长呢？
Soft drug (drug not likely to cause addiction(eg marijuana)and less dangerous than a hard drug such as heroin )
软性毒品（不易使人上瘾且危害性不及海洛因之类的硬性毒品者，如大麻）。