The covered karst is the great important engineering geologic problem recently discovered in Three Gorge Reservoir region.

三峡库区隐伏岩溶问题是近期发现的重大工程地质问题。

youdao

The covered karst is the great important engineering geologic problem recently discovered in Three Gorge Reservoir region.

三峡库区隐伏岩溶问题是近期发现的重大工程地质问题。

youdao