蓝洞

院长的蓝洞，长岛巴哈马-202米（663英尺）。

Dean 's Blue Hole , Long Island Bahamas – 202 meters ( 663 ft ) .

伯利兹大蓝洞

The Great Blue Hole , Belize

蓝洞是呈现出深蓝色调的水下深洞。

Blue holes are underwater sinkholes that appear dark blue in color .

蓝洞是一个直径为305米，123米深的圆型大洞。

It is a circular hole with a diameter of305 metres and123 metres deep .

该通告指出，其他关于蓝洞的活动，如科学考察和环境保护规划，都必须经过政府批准。

Other activities concerning the blue hole , such as scientific expeditions and environmental protection programs must be approved by the government , according to the notice .

位于山东省青岛市的中国海洋大学的杨作升教授表示，该深洞比起巴哈马的迪恩斯蓝洞要深100米，具有重要的科学价值。

Yang Zuosheng , a professor at Ocean University of China in Qingdao , Shandong province , said the sinkhole , which is about 100 meters deeper than Dean 's Blue Hole in the Bahamas , is of significant scientific value .