名词
中文翻译：麻醉剂
同义词：
['anesthesia', 'sedative', 'narcotic']
例句：
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1. The patient was given anesthesia before the surgery.
手术前，病人接受了麻醉。
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2. Sedatives are used to help people relax and sleep.
镇静剂用于帮助人们放松和入睡。
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3. Narcotics are highly addictive and should be used with caution.
麻醉药高度成瘾，应谨慎使用。