Coalla科阿利亚coaln.煤；木炭vt.烧成炭；供应煤vi.加煤；装煤coal hopper car煤炭漏斗车coal-gas flow瓦斯流动coal shiploader煤炭装船机coal ball stove煤球炉coal waste rock煤矸石coaling scuttle煤舱口coal-type gas煤型气coal ash fusion煤灰熔融性coals resources煤炭资源coal separation选煤

1. He breaks up strong ground with a pick.
   他用镐刨开坚硬的地面。
2. Formerly the coal was dug with picks and spades.
   从前用镐和铁锹采煤。