[N-UNCOUNT 不可数名词]海洛因Heroin is a powerful drug which some people take for pleasure, but which they can become addicted to.
Oxford
her·oin/ˈherəʊɪn; NAmEˈheroʊɪn/noun[uncountable ]a powerful illegal drug made from morphine,that some people take for pleasure and can become addictedto 海洛因◆a heroin addict吸海洛因上瘾的人her·oin/ˈherəʊɪn; NAmEˈheroʊɪn/