名词
中文翻译：Unknown
同义词：
['secondary graphite', 'secondary carbon', 'secondary carbon material']
例句：
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1.The second-stage graphite is usedin the production of high-performance batteries.
第二阶段石墨用于高性能电池的生产。
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2. The newgraphite material has excellent thermal conductivityand low density.
这种新型石墨材料具有优异的热导率和低密度。
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3. Thegraphite was extracted from the coal bya process that involved heating and pressure.
石墨是从煤炭中提取出来的，这个过程包括加热和加压。