impurities in coal 中文意思是什麼
impurities in coal
解釋
煤中雜質- impurities : 懸浮固體物
- in : adv 1 朝里，向內，在內。 A coat with a furry side in有皮裡子的外衣。 Come in please 請進來。 The ...
- coal : n 1 煤，煤塊，煤堆。2 〈pl 〉〈美國〉（一堆）燒紅的煤。3 〈常 pl 〉〈英國〉（幾塊）供燃燒的煤。4 ...
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To this day coal is said to be screened in the colliery when it has stone and other impurities removed from it.
據說煤中摻有石子和其它雜質須去掉時，至今仍得把煤在礦上篩過。
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