四面体

A prism whose bases are parallelograms.

底面都是平行四面体的棱柱。

We chose the advancing-front Delaunay algorithm because it can be parallelized easily and is convenient for magnanimity data.

DTETAD突破了传统的Delaunay四面体划分的限制，为网格划分等实际应用提供了理论基础。

Delaunay method for generation of 3D unstructured grids is analyzed and the tetrahedrization approaches are presented.

对生成三维非结构化网格的D e launay方法进行了分析，给出四面体网格生成的基本步骤。

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。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。