An affine transformation is one in which parallel lines remain parallel after the transformation.
仿射转换指的是平行线在转换后还保持平行。
Man and woman are two parallel lines, and it is the nature of parallel lines never to meet.
男人与女人是两条平行线。两条平行线是不会相交的。
I thought I could do was hold hands all the way down, but came to realize that a free hand in all but two parallel lines, when all away, still parallel to the parallel.
曾经以为可以这样牵着手一路走下去，可是放手了才明白一切只是两条平行线，当一切都烟消云散，平行的依旧平行。
With a pen, you can shade by hatching (making parallel lines), cross-hatching (parallel lines crossing over parallel lines), scribbling, stippling, or making other funky little marks.
用钢笔的话你可以通过排线来制造明暗(画平行线)，交叉排线(平行线相交)，涂鸦，点绘或者其他时髦的笔触。
With a pen, you can shade by hatching (making parallel lines), cross-hatching (parallel lines crossing over parallel lines), scribbling, stippling, or making other funky little marks.
用钢笔的话你可以通过排线来制造明暗(画平行线)，交叉排线(平行线相交)，涂鸦，点绘或者其他时髦的笔触。
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