| 词汇 | nitrous oxide |
| 释义 | ni·trous oxideBrE /ˌnaɪtrəs ˈɒksaɪd/ NAmE /ˌnaɪtrəs ˈɑːksaɪd/ (also informal ˈlaughing gas ) noun [U ]a gas used especially in the past by dentists to prevent you from feeling pain 氧化亚氮,笑气(旧时牙医用作麻醉剂) |
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