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1·The catalytic cycle of the reaction was proposed based on experiment results.

根据实验的结果建议了反应的催化循环机理。

2·Etoposide stabilizes a covalent topoisomerase II-cleaved DNA intermediate complex in the catalytic cycle of the enzyme, leading to genomic instability and cell death (2, 3).

依托泊苷能稳定酶催化性循环中的一种共价的拓扑异构酶ii裂解的DNA中间复合物，导致基因组不稳定性和细胞死亡(2,3)。

3·According to the control experiments and the experiment phenomena, a possible catalytic cycle and a possible key intermediate are rationally proposed to illustrate the experimental observations.

根据对比实验以及实验现象，提出了可能的催化循环和反应过渡态。

4·The influence of oxygen concentration and temperature on the conversion efficiency of catalytic converter was analyzed by examing the transient emission in NEDC(new European driving cycle).

通过研究NEDC循环工况下整车的瞬态排放情况，分析了减速断油及怠速停机过程中，氧浓度及温度的变化对催化器转化效率的影响。