The operation is carried out under a general anaesthetic.该手术是在全身麻醉情况下实施的。She had a confused idea of life in general.总的来说，她对生活非常困惑。Howe carefully cultivated Daniel C. Roper, the Assistant Postmaster General.豪谨慎地和邮政副部长丹尼尔·...
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...