四角

During the process of experimental teaching, it has been discovered that among cylinders and cones, students can better judge cones than tetra-angular pyramids; cones are more complicated than cylinders in the combination of surface control; and it is difficult for students to reasonably handle the parallel, ratio, and angle of perspective drawing.

五、在进行实验教学的历程中发现在柱体与锥体中学生的触觉判断以圆锥体最佳、四角锥最差；面与面的组合操作以锥体较难、柱体较易；透视图的平行、比例及角度的合理处理对学生是不容易的。

A plane figure consisting of four points, no three of which are collinear, connected by straight lines.

四边形，四角形由四个角组成的平面图形，没有任何三个点共线，通过直线相连接

Mathematics A plane figure consisting of four points, no three of which are collinear, connected by straight lines.

四边形，四角形：由四个角组成的平面图形，没有任何三个点共线，通过直线相连接

Polyhedrosis, the moon, gear, such as by the art-alloy die from refining.

三角、四角、多角、月亮、齿轮、美术型等是由合金模精制而成。

In the middle of it is a hall, using for the puppet to play. Except one side of this hall, the other three sides are empty. In the hall, there is a screen to shed the performances. When the glove puppet show became popular, the decorate of the quadrangle shed also became more delicate, coordinate with the technology of woodcarving and the traditional architectural style in China.

该三至五米宽之戏棚其构造类似于一座小型土地庙，有四根柱子，中间是大厅，为戏偶活动的舞台，其四面之中，三面皆空，大厅中有一层交关屏，用来遮掩演艺人之用，早期的四角棚的装饰及雕刻都较为简单，但后期逐渐发展得更为复杂精致，配合木雕技术以及中国传统建筑的风格来制作戏台。

Their brief encounter has created a complicated quadrangle...

他们短暂的相遇制造了一个复杂的四角关系。。。

NARRATOR: Lunches at the Quadrangle Club were famous for the intensity of intellectual discussion.

旁白：四角俱乐部的午餐因激烈的思想辩论而著名。

Wait for nearly jj has become a young man, then, whether it is triangular or quadrangular to see if you like the.

等差不多jj已经成了小伙子了，那么，至于是三角还是四角就看你喜欢了。

In order to study the various damage diagnosis methods, the finite element method hasbeen used to found orthogonal quadrangular pyramid steel grid numerical model.

为了研究各种损伤诊断的方法，本文利用有限元方法模拟了一个两向正交正放四角锥网架，以此作为数值试验的模型。

The quadrangular levelling system is adopted to improve the parallelism of slides. The press is controlled by PLC and supervised by person-computer interface.

压机而采用四角调平系统来提高滑块的平行度，利用PLC可以非常简便的实现对这一系统的控制，并且结合人机界面可以非常直观的对系统进行监控。

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。