四边形

Then the paper at large dissertates the technology of automatically generating quadrilateral grid about five kinds of tooth profile plane models which are commonly used in the finite element analysis of transmission gear.

然后详尽论述变速器齿轮有限元分析常用的五类齿廓平面模型四边形网格自动生成技术。

When I'm satisfied with the general volume a shell modifier helps me to give thickness to the piece. In this phase, I don't usually bother that much about every single rivet, hole or cut, I just try to develop a good quad topology of the main volumes. Of course the topology is done by taking count of the main cuts and holes, but the rest can be done easily with a normal or bump map. It's up to you to decide how much a single detail is worth to be modeled or can it be put into a bump map. I usually adopt a "comfortable" criteria...it means that if something looks tricky to me to be carved or extruded into an existing geometry I usually put it into a normal map. When you make something for production, you don't usually have much time to model everything, so you need to set priorities.

当我对整个盔甲的体积感满意之后，一个shell修改器就可以帮我给整个盔甲添加厚度，在这个阶段，我通常不会考虑太多那些细小的铆钉，洞眼或者切边，我只是给整个的模型确立一个好的四边形拓扑结构，当然拓扑是通过重视主要的切割和打洞来形成的，但其余那些细小的部分可以用一个normal 或者bump贴图很容易地模拟出来，这由你来决定到底一个细节是值得建模还是放到一个bump贴图里面，我通常采用一个&舒服&的标准，也就是说，如果有什么东西对我来说，在已有模型上再挤出或者开洞是非常麻烦的，那么我就通过Normal贴图来表现，而当你为商业生产制作模型时，你通常都没有足够的时间来把任何东西都建出来，因此你需要设置重点。

In the case of growth on the ploycrystalline diamond substrates under high methane concentration condition, diamond nano-platelets consisting of many smaller tabular crystallites with various shapes but with the same facets, such as trapezoid and parallelogram, appear in terrace and step structure on tabular surface.

在高甲烷浓度条件，多晶钻石基材上成长的奈米平板钻石，其外形结构是由各种形状(近似於梯形及平行四边形)的小平板组合而成，并且这些小平板会在平板钻石表面形成平台及台阶的结构。

Most crystals have six-sided symmetry, though three- or 12-sided snow crystals also fall. You will never see a real snow crystal with four, five or eight sides.

多数晶体呈对称的六边形，尽管有过三角形和十二边形的雪花，但现实中你绝不可能见到四边形、五边形或八角形的雪晶。

The scheme use quadrilateral directional impedance characteristics and R-L algorithm to calculate the impedance of the faulted phase. The results of simulation show that the performance of distance protection proposed is reliable, and can be used as backup protection for six-phase transmission line.

阻抗继电器采用四边形方向阻抗特性和R-L模型法进行故障相阻抗的测量，大量的仿真测试表明，该距离保护方案性能可靠，可以作为六相输电线路的后备保护。

The distances between inferior margin of 12th rib and the 3 above-mentioned nerves were all measured. Results: The superior lumbar triangle was quadrilateral (55%), triangular (35%) or irregular (5%). If the 12th rib was too short, the upper border of the triangle would be the 11th rib (5%). Four grouping patterns of the 3 nerves were found in front of the triangle, and the average distance between inferior margin of 12th rib and the 3 nerves was (16.92±6.32)mm,(59.49±14.97)mm and (112.49±17.15)mm, respectively.

结果：腰上三角的形态可为四边形(55%)、三角形(35%)和不规则形(10%)，该三角的上界可完全由第11肋(5%)构成；肋下神经、髂腹下神经和髂腹股沟神在腰上三角前方有4种不同的组合形式，三神经与第12肋下缘的平均距离分别为(16.92±6.32)mm、(59.49±14.97)mm、(112.49±17.15)mm。

This same anatomic configuration also allows some movement between the crest and the septum, and it is this instability that explains the frequent posttraumatic findings of a displaced quadrilateral septal cartilage from the groove of the crest.

同时这样的解剖特点，也使得鼻中隔和腭嵴之间有一定的活动度，正是这种结构的不稳定性可以解释为什么在创伤后经常容易发现四边形的鼻中隔从腭嵴凹槽上脱位。

This same anatomic configuration also allows some movement between the crest and the septum, and it is this instability that explains the frequent posttraumatic findings of a displaced quadrilateral septal cartilage from the groove of the crest.

同时这样的解剖特点，也使得鼻中隔和腭嵴之间有一定的活动度，正是这种不稳定的结构可以解释为什么在创伤后经常容易发现四边形的鼻中隔从腭嵴凹槽上脱位。

This same anatomic configuration also allows some movement between the crest and the septum, and it is this instability that explains the frequent posttraumatic findings of a displaced quadrilateral septal cartilage from the groove of the crest.

同时这样的解剖特点，也使得鼻中隔和腭嵴之间有一定的活动度，正是这种不稳定的结构可以解释为什么在创伤后经常轻易发现四边形的鼻中隔从腭嵴凹槽上脱位。

Shorter stamens abortive; anthers rhomboid-ovate, usually papery, abaxially long caudate-spurred, adaxially 2-setose at base.

短雄蕊败育；卵形，通常纸质的花药平行四边形，长尾状距，正面具刚毛在基部。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。