nitrous oxide
noun /ˌnaɪtrəs ˈɒksaɪd/
/ˌnaɪtrəs ˈɑːksaɪd/
(also informal laughing gas)
[uncountable]- a gas used especially in the past by dentists to prevent you from feeling pain
| 单词 | nitrous oxide |
| 释义 | nitrous oxidenoun /ˌnaɪtrəs ˈɒksaɪd/ /ˌnaɪtrəs ˈɑːksaɪd/ (also informal laughing gas) [uncountable]
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