亚洲91视频,国产91网,久久久久久久久久久久久久久国产,亚洲一区二区三区日本久久九,亚洲日本久久,国产精品久久久99,亚洲欧美一区二

Home / China / Society

China's longest karst caverns stretch for nearly 160 km

Updated: 2014-12-16 13:51 (Ecns.cn)
Comments
China's longest karst caverns stretch for nearly 160 km

Researchers from China and France work at the Shuanghe Karst Caves in Suiyang, Southwest China's Guizhou province. The Karst Caves, measured at 159.14 kilometers, is the second longest complex of caverns in Asia and the 11th longest known worldwide. The measured length may increase as the survey continues until Dec 20. [Photo/China News Service]

Previous Page 1 2 3 4 5 6 7 Next Page

...