So an easy thing to do in planar geometry is I want to make a line segment.

在平面几何里比较容易的一件事，就是做一个线段。

youdao

Considering visual analysis, traffic safety in some sense means that divers can clearly see the road alignment make up of planar and vertical alignments.

从视觉分析的角度出发，为保证行车安全，应尽可能让驾驶员清晰地看到由平面与纵断线形构成的道路线形。

youdao

Though, in the planar design, the visual percept itself is at rest, the changes of the figure and colors show a variety of dynamic forces so as to make the planar vision active.

在平面设计中虽然视觉对象本身是静止的，但图形与色彩的变化表现出各种动态力，促使平面视觉变得积极活跃。

youdao

So an easy thing to do in planar geometry is I want to make a line segment.

在平面几何里比较容易的一件事,就是做一个线段。

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