"This place was hell," says Tom Levy cheerfully as he stands over an open pit filled with ancient coal-black slag.
“这个地方以前几乎是个地狱，”托马斯·莱维风趣的说到，他站在一处被古老的墨黑炉渣填满的露天矿坑中。
It is actually black in color and the package says; contains slag and coal.
“它实际上是黑颜色的包说，”包含炉渣和煤。
In the third part, the preparation of flocculant from slag and pyrite cinder and its application in the treatment of cotton pulping black liquor were studied.
本文第三部分研究了用钢渣和硫铁矿渣制备絮凝剂及其在棉浆黑液处理中的应用。
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