The bulge of our spherical Earth blocks sunlight from the far hemisphere at the solstices; that same curvature allows the sun's rays to spread over more area near the top and bottom of the globe.
由于地球的球面形状，在至日突出的表面阻挡了阳光照射照远端的半球；同样是球面的原因，在至日阳光可以照射两极的更多地方。
The conclusion has been spread to spherical lens retroreflection array. The basic idea of the spherical lens retroreflector and its key points of application have been proposed.
并把此结论推广到球透镜逆反射阵列，提出球透镜逆反射器的基本概念及应用的要点。
The conclusion has been spread to spherical lens retroreflection array. The basic idea of the spherical lens retroreflector and its key points of application have been proposed.
并把此结论推广到球透镜逆反射阵列，提出球透镜逆反射器的基本概念及应用的要点。
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