an addiction to a drug (especially a narcotic drug)
drug addiction的用法和樣例:
例句
用作名詞 (n.)
ERIC J.NESTLER and ROBERT C.MALENKA study the molecular basis of drug addiction. 內斯特與曼能克兩人研究的是藥物成癮的分子機制。
Now there are no generally effective pharmacotherapties for drug addiction because of multi-induced factors and complicated neurobiological mechanism. 由於藥物成癮的誘發因素多,神經生物學機制複雜,至今仍沒有有效的治療手段。