查询词典 trapezoids

Questions in this content area are based on the properties and relations of plane figures, including angles and relations among perpendicular and parallel lines; properties of circles, triangles, rectangles, parallelograms, and trapezoids; transformation; the concept of proof and proof techniques; volume; and applications of geometry to three dimensions.

平面几何（23％）。这方面的考试内容是基于平面图形的性质及关系，包括角度，垂直线和平行线之间的关系；圆，三角形，矩形，平行四边形和梯形的特性；图形的转化；几何证明的概念和证明的技巧；体积以及几何在三维的应用。

Section method is to split the pit slope surface into several trapezoids so as to calculate their surface area;through a digital survey of the pit slope surface,a numerical elevation model is set up,on the surface the triangular mesh is built,and all the triangular meshes are piled up to get the surface area.

小三角锁法是通过对宕口坡表面数字化测量，根据测量数据建立数字高程模型，并在表面建立小三角锁，对所有小三角的面积累加得到面积的一种方法。小三角锁法大大提高了计算的准确度和效率。

We are forbidden from giving money to these shoeless, skinny children, as this will perpetuate begging.

向光着脚，骨瘦如柴的孩子施舍是不可以的，因为要招来无休无止的乞讨。

It would be hard not to fall victim to some sharpeyed policeman.

要想不被某个目光锐利的警察抓到，谈何容易。