an addiction to a drug (especially a narcotic drug)
例句
用作名词 (n.)
ERIC J.NESTLER and ROBERT C.MALENKA study the molecular basis of drug addiction. 内斯特与曼能克两人研究的是药物成瘾的分子机制。
Now there are no generally effective pharmacotherapties for drug addiction because of multi-induced factors and complicated neurobiological mechanism. 由于药物成瘾的诱发因素多，神经生物学机制复杂，至今仍没有有效的治疗手段。
美
