- presents challenges for the animals living there.
岛上的动物也要面临挑战 - But the greatest threat they face is change.
但它们眼前的最大威胁已经改变 - Christmas Island in the Indian Ocean.
这是印度洋上的圣诞岛 - For millions of years this remote spec of land has been ruled by crabs.
数百万年以来 这块遥远的陆地一直被蟹类统治着 - Their ancestors came from the sea,
它们的祖先来自海洋 - but most have now adopted a land-based existence.
但绝大多数品种现在已经适应了陆地上的生活 - Given there are so many of them, they get along relatively harmoniously.
鉴于它们的数量众多 彼此之间还算相对和谐
For millions of years this remote spec of land has been ruled by crabs. 数百万年以来 这块遥远的陆地一直被蟹类统治着
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