The blue hole

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

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。

The Great Blue Hole , Belize

伯利兹大蓝洞

Or the great blue hole , an underwater sinkhole off the coast of Belize .

或者这个巨大的蓝色坑洞，伯利兹海岸一个水下天坑。

Sansha in Hainan , China 's southernmost city , has banned fishing and tourism in and around the Sansha Yongle Blue Hole as part of its efforts to protect the maritime environment in the South China Sea .

我国最南端的城市--海南省三沙市已禁止在“三沙永乐龙洞”及其周边从事渔业生产、旅游观光活动，作为该市保护南海海洋环境的举措之一。

The most famous tourist attractions in Belize include the Great Blue Hole , a giant submarine sinkhole and the Mayan ruins .

伯利兹城最富盛名的旅游胜地莫过于巨大的水下天坑--蓝色巨洞以及玛雅遗址。

Organizations and individuals are forbidden from the activities in Longdong － known as " Dragon Hole " － or within 1 nautical mile of the blue hole , according to a notice issued by the management committee of the Yongle Islands in Sansha .

根据三沙市永乐群岛管理委员会发出的通知称，无论是组织还是个人，都禁止在龙洞周边1海里开展活动。