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北纬30度线——一条充满无数待解之谜的神奇纬线!北纬30度线,其实是一条看不见的线,一条地理学家为方便研究地球而画出的虚拟线,然而却没有任何一条经线或纬线有
30 degrees north latitude – a mysterious latitude full of mysteries to be solved! The 30 degrees north latitude line is actually an invisible line. A geographer drew a virtual line to facilitate the study of the earth, but none Warp or weft have