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| carbon A nonmetallic element existing in the three crystalline forms: graphite, diamond and buckminsterfullerene: occurring in carbon dioxide, coal, oil and all organic compounds | |||
| carbon | |||
| carbon: 90 短语, 17 学科 |
| 一般 | 8 |
| 农业 | 4 |
| 冶金 | 2 |
| 化学 | 3 |
| 地球科学 | 4 |
| 建造 | 2 |
| 技术 | 1 |
| 林业 | 1 |
| 环境 | 37 |
| 生命科学 | 3 |
| 生态 | 4 |
| 税收 | 6 |
| 经济 | 8 |
| 行业 | 1 |
| 财政 | 1 |
| 运输 | 2 |
| 食品工业 | 3 |