nitrous oxide
柯林斯词典
1. N a colourless nonflammable slightly soluble gas with a sweet smell: used as an anaesthetic in dentistry and surgery. Formula: N2O 一氧化二氮 (Systematic name dinitrogen oxideAlso called laughing gas)
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nitrous oxide
剑桥词典
- a type of gas with a sweet smell that is used as a weak anaesthetic (= substance that stops pain ), especially by dentists
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） 返回 nitrous oxide