| 词汇 | nitrous oxide |
| 释义 | nitrous oxide 1 ENTRIES FOUND: nitrous oxide (noun) nitrous oxide /ˈnaɪtrəs-/ noun nitrous oxide /ˈnaɪtrəs-/ noun Learner's definition of NITROUS OXIDE [noncount] : a gas that is used by dentists to keep patients from feeling pain一氧化二氮，笑气（牙医用作麻醉剂） — called also laughing gas |
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