An addictive drug, such as opium, that reduces pain, alters mood and behavior, and usually induces sleep or stupor. Natural and synthetic narcotics are used in medicine to control pain.
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释义
麻醉剂一种能使人上瘾的药剂,如鸦片,能够减轻疼痛,改变心情和行为,通常导致沉睡或麻木。天然和合成的麻醉剂用于医药止痛
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