对角线，水平，垂直以及汇聚线条(同上注)都很厉害，都是在框图时应该注意并加以利用来强化片子的。
Diagonal, Horizontal, Vertical and Converging lines all impact images differently and should be spotted while framing a shot and then utilized to strengthen it.
聚合线(两到多条来自不同部分、汇聚到一点的线)能更加有效。
Converging lines (two or more lines coming from different parts of an image to a single point) can be all the more effective.
球形的则不同，它会把波束汇聚到一条线上——这就是为什么阿雷西博先前使用的是“线反馈”天线。
A sphere, in contrast, concentrates its beam to a line - which is why a "line feed" antenna was originally used at Arecibo.
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