离子结构

Furthermore, the effects of ligands, metal and reaction time on the reaction were also researched, and the process of new ligand-metal catalysis for Diels-Alder reaction was also analyzed according to Evans" square planar mode and Corey"s tetrahedral manner.

我们对影响配体对映选择性能的各种因素，如配体结构、金属离子、反应时间等进行了研究，而且根据Evans的平面四方形模式与Corey的四面体过渡态理论为新配体—金属配合物催化的该反应提出了可能的反应机理，并对产物的优势构型作了理论分析。

The mechanism of the second kind of FRs, FRs , can be described as"Accelerating the Elimination of HCl and Crosslinking by Ion Model". FRs can obviously promote the elimination of HCl, decrease the on-set temperature of decomposition of PVC, it can promote the crosslinking during decomposition, reduce the total output of aromatic compounds, increase the gel of condensed phase and char residue, the char residue is loosened.

第二类阻燃抑烟剂对PVC的阻燃抑烟机理可用&快速脱氯化氢离子交联模型&描述，其主要特点为：阻燃抑烟剂在热分解过程中，转化成为MCl〓，它一方面促进PVC释放HCl，另一方面，促使体系产生分子间交联，使裂解气相产物中芳烃化合物含量减少，凝聚相凝胶含量变大，残炭量提高，残炭物结构呈松散状态。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。