这些平行线像是岔开了。

The parallel lines appear to diverge.

《牛津词典》

仿射转换指的是平行线在转换后还保持平行。

An affine transformation is one in which parallel lines remain parallel after the transformation.

youdao

只有在平坦的宇宙中，空间才符合标准的几何规律——三角形的内角和精确地等于180度，平行线永远不相交。

Only in a flat universe does space obey all the standard geometry-class rules-the angles of a triangle add up to exactly 180 degrees and parallel lines never meet.

youdao