煤被干馏后剩下固体残余物:焦炭.Coal is destructively distilled leaving a solid residue, coke.两者通过普通的分馏彼此分离.It can be separated from each other by ordinary fractional distillation.较重的沸腾着的馏分以液态停留在多孔的壁上.The heavier boiling fractions remai...
这一层也可以作为我们摔打时的隔离层或缓冲垫.It also works as insulation and cushions us from knocks and falls.在不同的层次之间是中间区域或缓冲区域, 有时称作较低的亚层.In between the different levels are intermediary areas or buffer zones, sometimes called lower sub pla...