... low-gear || 低速齿轮，低速传动 low-grade coal || 低质煤，低级煤 low-grade copper || 低品位铜，低级铜 ...
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低级煤 dant; grizzle; inferior coal; lean coal; low-grade coal; low-rank coal; poor grade coal 低级氢解 low grade hydrogenolysis .
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low grade coal 劣质煤 ; 低品位煤
very low grade coal 特低品位煤
burning low grade coal 燃烧劣质煤
low grade bituminous coal 低级沥青炭
low-grade anthracite coal 低挥发份无烟煤
The tariffs are a second blow for countries exporting coal to China, after an ban on selling or transporting low-grade coal.
对于向中国出口煤炭的国家来说，这些关税是第二次打击。此前中国宣布禁止销售或运输低等级煤炭。
Brown coal: a low-grade coal which commonly retains the structures of the original wood. It is high in moisture, low in heat value and checks Badly upon drying.
褐煤：一种低质煤，往往保存着原来的木质结构，高水分，低热值，干燥后龟裂严重。
German reunification in 1990 saddled the country with East Germany's low-grade brown coal plants, the dirtiest in Europe.
1990年德国统一，东德很多使用粗煤的低级工厂并入了西德，这是全欧洲最脏的工厂。
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