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| 二氮; 分子氮 | |||
| 双氮 | |||
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dinitrogen : 15 phrases in 7 subjects |
| Chemistry | 5 |
| Food industry | 2 |
| General | 1 |
| Pharmacology | 1 |
| Technology | 1 |
| United Nations | 4 |
| Water resources | 1 |
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