| 单词 | nitrous oxide |
| 释义 | nitrous oxide nitrous oxide n: (laughing gas, N2O) SC 笑气 xiào qì SC 一氧化二氮 xiào qì，yì yǎng huà èr dàn SC 氧化亚氮 xiào qì，yǎng huà yà dàn Nitrous Oxide and Novocaine are the most common methods dentists use to dull pain during procedures. |
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