- 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 - They're the gardeners and caretakers of a tiny crab utopia.
它们是这个小小蟹类乌托邦的园丁和守卫 - Once a year, they must all return to the sea to breed,
每年它们都会回到海洋中进行繁殖 - and the march of the red crabs
而红蟹大迁徙 - is one of the greatest natural spectacles on earth.
是地球是最伟大的自然奇观之一 - There are 50 million of them.
迁徙的红蟹数量多达五千万只
Once a year, they must all return to the sea to breed, 每年它们都会回到海洋中进行繁殖
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