1. carbon and graphite material 
   碳和石墨材料
2. Graphite is chemically allied to diamond. 
   石墨和金刚石在化学组成上有联系。
3. graphite and diamond are allotropes of carbon. 
   石墨和金刚石是碳的同素异性体。
4. a pencil that has graphite as the marking substance. 
   用石墨作标记物质的铅笔。
5. consumption in socialist society 
   社会主义社会的消费

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