1·Clearly each plane graph has exactly one unbounded face.
显然，每个平面图都有一个无界面。
2·A plane graph together with the set of faces it determines is called a plane map.
一个平面图与它所确定的面的集的总体称为一个平面地图。
3·In this paper, we gave the optimization method when drawing the plane graph on the computer screen.
本文给出了在计算机屏幕上绘制平面图形时，提高其绘制效果的优化方法。
4·The identifying and classifying method of the features of dimension elements in a 2-d plane graph is suggested.
本文提出二维平面图形的尺寸单元特征识别分类的方法。
5·Based on the study of the structure of maximum plane graph, with normal mathematic reasoning, this thesis studied the color number problem of maximum plane graph.
以极大平面图的结构研究为基础，采用常规的数学推理方法研究极大平面图的点色数问题。
6·We are replacing the graph by its tangent plane.
我们用函数的切平面来替代它的图像。
7·So, that gives me a slice of my graph by a vertical plane, and the slice has a certain slope.
那样给出图像的一个垂直切面，这个切面上有某个斜率。
8·Say you have a minimum, well, the tangent plane at this point, at the bottom of the graph is going to be horizontal.
如果你说这是个极小值，那么这点的切平面应该是水平的。
9·We'll be slicing things by a plane that is now in the direction of this vector,u and we'll be looking at the slope of the slice of the graph.
用沿着向量方向的平面,切开图像,然后看图像的剖面图，找出斜率。
10·And, in terms of a graph, they correspond to slicing by a plane that's parallel to one of the coordinate planes, so that we either keep x constant, or keep y constant.
从图像上看，它们对应于,用平行于坐标轴的平面横截图像得到的，过程中保持x或y恒定。