名词
中文翻译：麻醉剂
同义词：
['anesthesia', 'sedative']
例句：
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1.The doctor gave her anesthesia before the surgery.
在手术前，医生给她打了麻醉。
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2.She took a sedative to help her sleep better.
她吃了一种镇静剂来帮助她睡得更好。
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3.Morphine is a powerful narcotic that can be used for pain relief.
吗啡是一种强效的麻醉剂，可以用来缓解疼痛。