Several of the dark coal seams are visible along the sunlit southern wall of the pit (these may be more visible in the larger image version).

矿藏的南部有阳光照射，因此一些黑色的煤层接缝处清晰可见(在更大成像图片上这应该会更为清晰)。

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The main transformed parts included water cooling wall, burner, coal saver, dust removing equipment, air suction machine and coarse powder separator.

主要改造部分有：水冷壁、燃烧器、省煤器、除尘设备、吸风机和粗粉分离器等。

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While burning solid fuels, like biomass, coal and waste, wall-burning will occur to a certain extent.

在燃用固体燃料，如生物质、煤、固体废弃物时，都存在一定程度的附壁燃烧现象。

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The front page, as always, was filled with three- and four-line advertisements for Newcastle, Silkstone, or Wall's-End coal, Bailey's elastic stockings, ladies' abdominal belts, Pulvermacher's Patent Galvanic Chain Bands, Antakos corn plasters, Iceland Liniment for chilblains, and "Want Places" appeals from wet nurses, scullery maids, and cooks, each willing to supply testimonials about their skills and finer qualities.

NPR: Excerpt: 'Exiles'

Wall Street values the reserves of coal companies at 7 cents per million Btu of chemical energy.

FORBES: Magazine Article

The investigations into coal ash have been ongoing ever since a retention wall owned and controlled by the TVA broke in December 2008.

FORBES: Coal Ash Spilling Into Obama and Romney Race