R " is a replaceable function , e . g . acetoxy, methoxy, their acyloxy and alkoxy homologs or halo.R ” 是取化基,如乙氧基 、 甲氧基及它们的环氧和烷氧同系物或卤基.The results show that zinc acetate - stearic acyloxy has thermal stability and synerg...
How far did the film tell the truth about Barnes Wallis?影片讲述的巴恩斯·沃利斯的故事有多少真实的成分？How far did the film tell the truth about Barnes Wallis?...影片讲述的巴恩斯·沃利斯的故事有多少真实的成分？Wallis spoke glowingly about players like Chapman.沃利斯对查普曼...
他脑瓜灵活.He has a flexible mind.你干嘛不早告诉我, 你这木头脑瓜!Why didn't you tell me earlier, you blockhead!" 我对这种榆木脑瓜的家伙一点也不可怜. ”" I haven't any pity for a man who would be such a chump as that. "...
She gave a contemptuous little laugh.她鄙夷地轻轻笑了笑。Canete's mouth twisted in a contemptuous sneer.卡内特傲慢而轻蔑地撇了撇嘴。She gave him a contemptuous look.她鄙夷地看了他一眼。...