用最明显的图形来描述这个过渡的特性就是：当在两个圆之间绘制一条直线，直线与每个圆只有一个交点时，那么这条线就是两个圆的切线。
The quality of this transition is best visualized by a straight line drawn between two circles: the line's only point of contact with each circle is tangential.
就这样我们各自都背过了身，向着两个没有交点的方向走去。
So we each back after a body, facing two no intersections occur directions.
其实并不是因为这条线与曲线有两个交点，因为这条线可能是扭来扭去的，这条曲线可能是扭来扭去的，甚至前前后后绕来绕去好几次都有可能。
But it's not really the fact that the thing crosses at two places, because the line could be wiggly, the curve could be wiggly, and it could have crossed back and forth a number of times.
两个曲面相交得到一条曲线，曲线与第三个曲面的交点既是用户的三维坐标。
Two of them intersect in a curved line which in turn intersects with the third hyperboloid in a point corresponding to the unknown three-dimensional user position.
两个曲面相交得到一条曲线，曲线与第三个曲面的交点既是用户的三维坐标。
Two of them intersect in a curved line which in turn intersects with the third hyperboloid in a point corresponding to the unknown three-dimensional user position.
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