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| 英语 词库 | |||
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| A naturally abundant element that occurs in many inorganic and in all organic compounds, exists freely as graphite and diamond. | |||
| carb | |||
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| Carboniferous (MichaelBurov); Carb (MichaelBurov) | |||
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| Carboniferous (MichaelBurov); Carb (MichaelBurov) | |||
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carbon : 4 短语, 3 学科 |
| 农业 | 2 |
| 食品工业 | 1 |
| 饮料 | 1 |