atoll
['ætɒl]
n. 环状珊瑚岛, 环礁

1. Rennell,86 km long x15 km wide, is the largest raised coral atoll in the world.
   伦尔岛八十里，十里，界升珊瑚环礁。
2. A major feature of the island is Lake Tegano, which was the former lagoon on the atoll.
   岛特特诺湖，环状珊瑚岛泻湖。
3. Sleek and swift, gray reef sharks cruise past a remote-control camera in the waters of the Bikini Atoll.
   圆滑体态，矫健身姿，岛(绍尔群岛珊瑚岛)海鳍鲨游摄影师镜头。

atoll
[ noun ]
an island consisting of a circular coral reef surrounding a lagoon
<noun.object>




Atoll \A*toll"\, n. [The native name in the Indian Ocean.]
A coral island or islands, consisting of a belt of coral
reef, partly submerged, surrounding a central lagoon or
depression; a lagoon island.