The cycloaddition itself is the slow step . 环化作用本身是慢的一步。
Continuous application may lead to sensitization . 连续用药可导致敏化作用。
This reaction involves disproportionation of the aldehyde . 这个反应就是醛的歧化作用。
The holes themselves have a restricting or stabilizing effect because flow may become sonic . 因为这时流动可成为音速流动,所以这些小孔本身有一种节制作用或稳定化作用。
An increase in hydrogen ions within cell walls would decrease ionization of carboxyl groupings of the cellulosic fraction . 细胞壁内部氢离子浓度的增高,能够降低部分纤维质羧基的离子化作用。