The island is encircled by a coral reef.

这个岛周围都是珊瑚礁。

An unspoiled coral reef encloses the bay.

未经破坏的珊瑚礁围绕着该海湾。

A coral reef is built by the accretion of tiny, identical organisms.

珊瑚礁是由相同的微生物累积形成的。

More than 1,000 shipwrecks litter the coral reef ringing the islands.

一千多艘遇难船只散布在环绕岛屿的珊瑚礁之中。

On a coral reef in the Bonin Islands, an abandoned wormhole is home to a hermit crab.

在小笠原群岛一个珊瑚礁上，一个废弃的虫洞是寄居蟹的家。