| 单词 | hard coal |
| 释义 | hard coal (once / 72069 pages) n WORD FAMILY hard coal: hard coals USAGE EXAMPLESAnd so Germany continues to rely on dirty lignite and only slightly less dirty hard coal. Economist(Aug 11, 2016) The use of hard coal has declined substantially, but not the use of lignite. National Geographic(Dec 12, 2015) The destination: the main government building of Antratsyt, a town named for anthracite, or hard coal. New York Times(Jun 01, 2014) n a hard natural coal that burns slowly and gives intense heat Syn|Hyper anthracite, anthracite coal coal fossil fuel consisting of carbonized vegetable matter deposited in the Carboniferous period |
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