某碳氢化合物已知可能是烯烃或是烷烃.A hydrocarbon was known to be either an alkene or alkane.在较高的烯烃情况下, 高能的中间物稳定作用更易出现.With the higher olefins, stabilization of the energetic intermediates occurs more easily.有时它们就难于和芳香族或烯烃的吸收峰相互区别.They ar...
Character is not separable from physical form but is governed by it.性格和外表是分不开的，而且观其形知其性。Soldiers are governed by military discipline.士兵受军纪约束.They governed the city with a heavy hand.他们用高压手段统治该城....
Cairo has only thirteen square centimetres of green space for each inhabitant.开罗居民的人均绿地面积仅13平方厘米。This is a ruler graduated in both inches and centimetres.这是一把刻有英寸和厘米的尺子.This ruler has one scale in centimetres and another...
They started to mend the woodwork and paint the walls.他们开始修补木建部分，粉刷墙壁。The hall is decorated in bright orangey-red with black and gold woodwork.整个大厅用鲜艳的橘红色装饰，木建部分漆成黑色和金色。They were settling to their work, rubbing down the ...