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...
Melanie plunked her cosmetic case down on a chair.梅拉妮把化妆盒砰的一声扔到椅子上。She's obviously had some sort of cosmetic surgery.她显然做过某种美容术.These changes are purely cosmetic.这些改变纯粹是装饰门面....