清晰度：控制宽或窄的发射模式。
Sharpness: Controls how wide or narrow the emission pattern is.
一个评论的问题在形式上可能是宽或窄的。
The questions that a review addresses may be broad or narrow in scope.
过去，特轻型、轻型、中型和重型被用于宽或窄的共轭直径上面。
Formerly, the terms extra-light, light, medium and heavy were applied to the diameters, and narrow and wide to the width dimensions.
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