通常阳离子交换量随破裂增加而增大.Cation exchange capacity generally increases with an increase in broken bonds.亚胺基杂环丙烷季铵盐的阳离子,一定是按协同反应的方式开环的.The aziridinium ions must all be opened by a concerted process.溴、氯阳离子化合物的数量受局限.The number of ca...
She watches him plane the surface of a walnut board.她看着他刨平一块胡桃木板。The stool comes in several sizes in walnut or mahogany.凳子有几种尺寸，材质分胡桃木和红木两种。Black walnut is extremely sensitive to damage from late spring frosts.黑胡桃对春天晚霜的危...