Results Galangin was obtained step column chromatography of polyamide only once.结果运用聚酰胺柱层析一次分离,获得有效成分高良姜素.Results Galangin was obtained by on - step column chromatography of polyamide only once.结果运用聚酰胺柱层析 - 次分离,获得有效成分高良姜...
Three hours have passed since the discussion was begun, and I'm afraid they will protract It'still longer.这个讨论会已经开了3个小时了, 而且恐怕他们还会拖延下去的.The cat can protract its paws.猫能伸其爪.Let's not protract the debate any...