在这种距离下，即便是聚焦良好的光束到达地球时也会分散到上千公里宽的面积上。
Over those distances, even a sharp laser beam would spread to thousands of kilometres wide by the time it reached Earth.
住房统计聚焦于民众房间数量以及是否具有基础的公共设施，而不是实际的居住面积和地点。
Housing stats focus on number of rooms to people and whether or not facilities have basic amenities, rather than say, actual space or location.
本文介绍用面积编码的方法将滤波函数为正弦函数的匹配滤波器和菲涅耳波带片组合在一起的自聚焦滤波器。
This paper presents a self focusing filter which is composed of matched filter with sine form and Fresnel zone plate by means of area coded method.
本文介绍用面积编码的方法将滤波函数为正弦函数的匹配滤波器和菲涅耳波带片组合在一起的自聚焦滤波器。
This paper presents a self focusing filter which is composed of matched filter with sine form and Fresnel zone plate by means of area coded method.
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