A system of coordinates in which a point is located by its distance and direction (Angle) from a fixed point on a reference line (called the polar axis).
一种用点离基准线上(称极轴)固定点的距离和方向(角度)来表示点位置的坐标系统。
According to measuring the coordinates of each span of long span double arched bridge, the arch axis for every span is determined.
通过测量拱腹各点坐标来确定双曲拱桥每孔的拱轴线。
This is a realization of the C painting curve procedures, the screen shows a coordinate axis through the keyboard input the coordinates…
这是一个用C实现的画曲线的程序，在屏幕是显示一个坐标轴，通过键盘输入的坐标画出曲线。
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