One of a set of parallel geometric figures, such as lines or planes.
平行线, 平行面如直线或平面等一组平行的几何图形之一
A geometric element that generates a geometric figure, especially a straight line that generates a surface by moving in a specified fashion.
母点, 母线形成一个几何图形的几何要素, 尤指通过以规定方式运动而产生一个面的一条直线
Not situated at or in the geometric center.
离心的不位于或在几何中心的
