Graphite

['græfaɪt]

解释:

(noun.) used as a lubricant and as a moderator in nuclear reactors.

伯特校对--From WordNet

解释:

(n.) Native carbon in hexagonal crystals, also foliated or granular massive, of black color and metallic luster, and so soft as to leave a trace on paper. It is used for pencils (improperly called lead pencils), for crucibles, and as a lubricator, etc. Often called plumbago or black lead.

格拉迪斯校对

同义词及近义词：

n. Plumbago, black-lead.

爱德华整理