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

1.氧化，硫化和乙烯亚胺也可以按类似于氧?胱拥幕?理进行聚。

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

2.评述了调节膦的开发、特、及其在中国的应用前景。