•a campaign to stop the illegal sale of cigarettes to children under 16禁止向16岁以下儿童非法销售香烟的运动

•Prostitution is illegal in some countries.卖淫在某些国家是不合法的。

•Cocaine, LSD and heroin are all illegal drugs/substances.古柯碱、迷幻药和海洛因都是非法毒品。