By using mathematical induction it has been proved that every plane graph is 4-colourable.

A plane graph G partitions the rest of the plane into a number of connected regions;

一个平图G把平面划分成若干个连通区域，这些区域的闭包称为G的面。

One Class of Four-Coloring Maximum Plane Graph

一类4&可着色的极大平面图

This paper expounds the basic principles and methods of drawing a geological section or plane graph with computer aided design.

阐述了计算机辅助绘制地质剖面图和平面图的基本原理和方法，研制了图件绘制的人机交互式软件。

Generation of All Hamiltonian Cycles in a Plane Graph

平面化图的哈密顿圈的产生

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。

Determine the acceleration of any point in a plane graph using the instantaneous centre and projection methods

用瞬心法和投影法求平面图形内任一点的加速度

The 3-regular plane graph and plane triangulation

三正则平面图与平面三角剖分图

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。

A Mesh Search Algorithm On Plane Graph

平面图网孔搜索算法

Structural algorithm of maximum plane graph

极大平面图的构成算法

The above representation of a graph is said to be a plane graph.

一个图的如上所述的表示称为一个平面图。

The Solution to Parallel Projection of Plane Graph in Space

空间平面图形平行投影图的求解

The Optimization Method for to Improving the Effect of the Plane Graph Drawing

提高平面图形绘制效果的优化方法

The Research and Application of Regular Plane Graph Detection Approaches

平面规则图形检测算法的研究与应用

Study on color number of maximum plane graph

极大平面图的色数研究

Drawing a geological section or plane graph with computer aided design

地质剖面图和平面图的计算机辅助绘制

Experimental Study on Soil Erosion Characteristics of Steep Slope on Loess Plateau

黄土高原陡坡土壤侵蚀特性试验研究

A study of run& off agriculture in Loess Plateau

黄土高原地区雨养农业初探

Plateaus and mountains make up 60 per cent of China's total area.

高原和山地占中国总面积的百分之六十。

As our technology advances, scientists are able to observe the once-secret behaviors of animals such as the Pilot Whale, diving deep below the surface, and exhibiting behavior no one ever suspected.

随着人类科技的进步，科学家们能够在深海中观察圆头鲸等动物不为人知的行为举止，并将这些体态展现出来。