When the Hawaiian Islands emerged from the sea as volcanoes, starting about five million years ago, they were far removed from other landmasses.
当夏威夷群岛从大约500万年前开始以火山的形式出现在海面上时,它们远离其他陆地板块。
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Unlike Oceanic islands that were once part of continental landmasses, islands formed by such geological processes as volcanism contain only plants and animals that could be transported there.