四边形地

Research found, generally speaking, students' concept image is not fully covered about quadrilaterals. That is to say, some graph is excluded wrongly. For example:students took oblique square is rhombi, not square. This phenomenon probably caused by they see the typical shape all the time, which will impact the development of the higher level reasoning. Say, students might not be able to understand the inclusion relationship between square and rhombi.

研究发现，学生在四边形几何图形的概念心像上普遍有包含性不足的情况，也就是有些图例被错误地排除（如：以为斜摆的正方形是菱形，但不是正方形），此一现象应与学生接触的通常是典型图例所致，且会影响更高层次的几何推理之发展，例如无法理解正方形与菱形的包含关系。

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。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新