| 释义 |
graphite美 ['ɡræ.faɪt] 英 ['ɡræfaɪt] 1. | 石墨a soft black mineral that is a form of carbon . Graphite is used to make pencils, to lubricate machinery, and in nuclear reactors . |
n. | 1. a soft dark carbon that conducts electricity, occurs naturally as a mineral, and is also produced industrially. 2. a soft black substance used in pencils |
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