| 单词 | bright coal |
| 释义 | > as lemmasbright coal bright coal n. shiny, black bituminous coal. ΚΠ 1771 J. Hill Fossils 349 (table) Bright coal... Heavy. Flaky, and clean. Shining black. 1874 Proc. Lit. & Philos. Soc. Manch. 13 125 Soft coals yielding a large amount of charcoal enclosed in bright coal nearly always show plenty of structure in the ‘mother coal’. 2005 Palynology 29 223/1 Coals of the Beluga Formation are commonly 0.5 to 2 m thick..and interspersed with vitrain (bright coal) bands. < as lemmas |
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