火药是希腊火的直接衍生物.Gunpowder was the lineal successor of the Greek fire.这类合成物是亚硝基羟胺衍生物.These compounds are nitrosohydroxylamine derivatives.很多环戊烷的衍生物在这个范围也出现吸收.Many cyclopentane derivatives also absorb in this region....
They have shacked up together.他们同居了.We were attacked by the wind and sands . Our lips become weather - shacked and our faces turn blue.我们被风沙袭击得嘴唇干裂,脸皮发紫....