四边形

It includes line, polygons, quadrilaterals, explosions etc.

这个平台包括了线形、四边形、多边形、翻转等多种功能。

The number of quadrilaterals increases in every step by a factor of 2 instead of 4. Applying the subdivision twice is the same as one dyadic dual subdivision and a rotation.

每细分一次，四边形网格数目增加为原来的两倍，两次细分结果相当於一次二分对偶细分和一个旋转。

This study tries to realize grade 6th students' understanding about quadrilaterals, through the interaction between the concept image and the concept definition.

本研究主要是利用概念心像和概念定义的互动历程来探究国小六年级学童对於四边形几何概念的了解情形。

For example, a cube is made up of six quadrilaterals where each vertex is shared by three polygons, but a different normal should be used for each of the three instances of each vertex, but a sphere is made up of many polygons where all vertices have common normals.

例如，一个立方体是由六个四边形组成，而每一个顶点被三个多边形共用，但是每一个顶点的三个实例应该使用不同的法向量，而由许多多边形组成的球，其所有顶点就有同样的法向量。

Notice that (1) the subdivision is geometry based, i.e. high curvature areas receive more quadrilaterals, and (2) low curvature areas contain more quadrilaterals than necessary due to the crack-preventing nature of the process.

注意（1）这个细分是基与几何的，就是，大曲率的区域有更多的四边形，因为这个过程有防止出错的特性。

This defines a mesh of quadrilaterals or a quad-mesh.

通过这些就可以定义四边形的网眼。

has 1080 quadrilaterals, and the data set contains 11,517 points, giving rise to 12,496,680 point projections.

例如，Fig.5中的细分有1080个四边形，并且数据中包含11517个点，也就平生了12496680个点投影。

No matter what kinds of quadrilaterals, counter-examples of the two groups have the effect of concept change. There is no test of significance of "change" between groups. It means counter-examples don't need to be simplified for the purpose of concept change.

统计结果显示不论哪一种四边形，两组反例在低度外延概念上都发挥概念调整的效果，组别间并无显著差异，表示学童不须透过简化后的反例便能进行概念调整活动，达到概念调整的目的。

The purpose of this study is to discuss students' geometric concept and meta-cognition of quadrilaterals by employing the geometric thinking model developed by Pierre van Hiele and the performance assessment.

本研究旨在结合van Hiele几何思考模式与实作评量，探讨学生的四边形几何概念及其后设认知。

In most of the modeling situations, the patches are defined over a topologically rectangular mesh.

大多数的造型系统曲面是通过四边形拓扑网格来定义的。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。