论文部分内容阅读
为求l、m两异面直线的距离d,除可直接找出公垂线的简单情况之外,一般先作一过m且平行l的平面,由于l与这平面的距离就等
To find the distance d between the straight lines l and m, in addition to the simple case of finding the vertical line directly, we generally make a plane that passes m and parallel l, because l is away from this plane.