Many oceanic islands are volcanic.

很多海洋岛屿是火山岛。

《柯林斯英汉双解大词典》

Most oceanic islands are similar to one another in latitude and contain plants and animals typical of tropical islands.

大多数海洋岛屿彼此都纬度相近，并且都有热带岛屿典型的动植物。

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The author mentions the estimated numbers of birds and coral fish species on various Oceanic islands in order to demonstrate how much knowledge about Oceanic species has been accumulated.

作者提到了各种海洋岛屿上鸟类和珊瑚鱼物种的预估数量，以显示已经积累了多少关于海洋物种的知识。

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They are made of continental rather than oceanic rock, and seem to be a small part of the jigsaw puzzle of continental drift rather than genuine oceanic islands.

ECONOMIST: Mass extinctions

The science team likened its chemistry to some relatively rare but well-studied alkaline rocks on Earth found on oceanic islands such as Hawaii and the Azores, and also in rift zones like the Rio Grande.

BBC: Cosmic coincidence on the road to Glenelg

It is the oldest of three oceanic volcanic islands in the Gulf of Guinea.

UNESCO: EDUCATION