0 a type of gas with a sweet smell that is used as a weak anaesthetic (= substance that stops pain), especially by dentists -- óxido nitroso
中文繁体
一氧化二氮, 笑氣(一種帶甜味的氣體,有輕微的麻醉作用,常用於牙科止痛)…
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一氧化二氮, 笑气(一种带甜味的气体,有轻微的麻醉作用,常用于牙科止疼)…
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tlenek azotu…
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