| 单词 | pencil lead |
| 释义 | pencil lead (once / 562825 pages) n WORD FAMILY pencil lead: pencil leads USAGE EXAMPLESThe planet Mercury may once have been encased in an outer shell of graphite, the same material used as pencil lead. BBC(Mar 07, 2016) Your sinuses open off your nasal cavity like rooms off a hallway, with doorways no wider than a pencil lead. US News(Feb 04, 2016) The black blocks were graphite, the mineral used to make pencil leads. Steve Sheinkin, Bomb(2012) n mixture of graphite with clay in different degrees of hardness; the marking substance in a pencil Syn|Hyper lead black lead, graphite, plumbago used as a lubricant and as a moderator in nuclear reactors |
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