narcotic
柯林斯词典
1. N-COUNT Narcotics are drugs such as opium or heroin which make you sleepy and stop you from feeling pain. You can also use narcotics to mean any kind of illegal drugs. 麻醉劑; 毒品
He was indicted for dealing in narcotics. 他因販賣毒品而受到起訴。
2. ADJ If something, especially a drug, has a narcotic effect, it makes the person who uses it feel sleepy. 麻醉的
...hormones that have a narcotic effect on the immune system. …對免疫系統有麻醉作用的激素。
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