phong nha 中文意思是什麼
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The karst formation of phong nha - ke bang national park has evolved since the palaeozoic ( some 400 million years ago ) and so is the oldest major karst area in asia
豐芽格邦國家公園的喀斯特地貌的形成是從古生代(大約40億年前)開始的,是亞洲最古老的喀斯特地貌。
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