1. relating to or resembling anthracite coal. 
   无烟煤的或似无烟煤的。
2. Waste from anthracite coal mines, consisting of fine coal, coal dust, and dirt. 
   无烟煤废渣无烟煤煤矿的废弃物，由细粒无烟煤、煤尘和尘土构成
3. A dense, shiny coal that has a high carbon content and little volatile matter and burns with a clean flame. 
   无烟煤一种很亮的高密度煤，含炭量高，挥发性物质少，燃料时火焰纯净
4. spread of disease process,development of disease 
   传变
5. To become less strict. 
   变宽松，变温和

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