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 ...
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 ...
A thousand thanks [ pardons , apologies ].万分感谢 [ 对不起 ].My grandmother pardons us when we are mischievous.我们淘气时,祖母宽恕我们.God pardons always, man pardons sometimes, but nature never does.上帝永远是宽恕的, 人有时候会, 而大自然从来不会宽恕....