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英语翻译A drug is,in the broadest of terms,a chemical substance

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英语翻译
A drug is,in the broadest of terms,a chemical substance that has known biological effects on humans or other animals.Foods are generally excluded from this definition,in spite of their physiological effects on animal species.
In pharmacology,a drug is "a chemical substance used in the treatment,cure,prevention,or diagnosis of disease or used to otherwise enhance physical or mental well-being."[4]Drugs may be used for a limited duration,or on a regular basis for chronic disorders.[7]
Recreational drugs are chemical substances that affect the central nervous system,such as opioids or hallucinogens.[7] They may be used for effects on perception,consciousness,personality,and behavior.[7][8] Many recreational drugs are also used in medicine.[3]
Some drugs can cause addiction and habituation[8] and all drugs have side effects.[9] Many drugs are illegal for recreational purposes and international treaties such as the Single Convention on Narcotic Drugs exist for the purpose of legally prohibiting certain substances.
在最宽泛的术语,药物是化学物质,已知的生物效应对人类或其他动物.食物通常被排除在这个定义,尽管他们对动物的生理影响.
在药理学,药物是“化学物质用于治疗,治疗,预防、诊断疾病或用于其他增强身体或精神健康.”[4]的药物可能用于有限的持续时间,定期或慢性疾病.[7]
毒品是影响中枢神经系统的化学物质,如阿片类药物或迷幻剂.[7]他们可能用于对认知的影响,意识,人格,和行为.[7][8]许多毒品也用于医药.[3]
有些药物会导致上瘾和习惯化[8]和所有药物有副作用.[9]许多毒品是非法的娱乐用途和单一公约》等国际条约毒品为目的的法律禁止某些物质存在.