onium

Epoxides, episulphides and ethylene imines also polymerize via similar cyclic onium ion mechanisms.

环化合物，环硫化合物和乙烯亚胺也可以按类似于环?拥幕?理进行聚合。

This paper discussed study on the development physi cal and chemical properties,crop safety,and application prospect of fosamine amm onium in China.

评述了调膦的开发、特性、安全性及其的应用前景。