The infra - red spectra of quinones present a number of interesting features.醌类的红外光谱具有一些有趣的性质.Ethylene and trans - dichloroethylene are both inactive in the infra - red in this region.乙烯和反式二氯乙烯在红外光谱的这个区域都无活性.Infra - red ...
我和姐姐的确在半夜大吃了一顿。Well we did have a midnight feast, me and my sister.大吃特吃了一通冰激凌之后她上了楼。After pigging herself on ice cream she went upstairs.他敞开胃口大吃,却只喝啤酒。He ate heartily but would drink only beer....