ile:07·长风 • 七万里.mp3 file:02 长风 • 两万里(第二期).m4a file:08·长风 • <em>八万里</em>
ile:五带划分.SWF file:太阳直射点的移动.avi file:坐地日行<em>八万里</em>.swf file:昼夜成因及变化.SWF file:太阳直射点移动引起的昼夜长短变化(朱丰年).swf file
ile:昼弧夜弧沿线变化.avi file:昼夜长短变化.swf file:五带划分.SWF file:太阳直射点季节移动与昼夜长短的关系.swf file:坐地日行<em>八万里</em>