无尽汪洋 11-英语听力

[00:00.33]Tropical islands are an obvious magnet for life.
热带岛屿吸引着众多生灵 [00:04.08]But things are just as busy underwater.
但是水下也同样得热闹 [00:07.70]Deep currents collide with these islands,
深海洋流与这些岛屿碰撞 [00:10.49]forcing small but vital amounts of nutrients up from the depths.
迫使小而重要的营养物质从深处上浮 [00:14.61]At 50 metres deep, sea fans are amongst the first to benefit.
在50米深处，海扇是最早的受益者之一 [00:19.63]Closer to the surface, corals have sunlight to help them grow.
靠近海面的珊瑚有阳光帮助它们生长 [00:24.72]And thanks to the smallest trickle of nutrients,
并且仰赖于营养物质的缓缓流动 [00:28.00]a barren desert can bloom into an underwater oasis,
贫瘠的海底沙漠得以成为一片水下绿洲 [00:32.28]supporting a greater variety of life than any other ocean habitat.
生活在此的生物种类比其他海洋栖息地更加多样 [00:37.76]These coral reefs are a magnet for green turtles,
这些珊瑚礁对绿海龟充满了吸引力 [00:42.66]offering a service not available in the open ocean -
在这里可以享受到远洋海域所没有的服务 [00:46.11]a good clean-up by a shoal of tangs.
成群的刺尾鱼帮它清理身体 [00:49.45]This work-over is far from cosmetic.
这项服务绝不只是为了美容而已 [00:51.97]As well as removing parasites,
鱼群清洁不仅能够除去寄生虫 [00:53.44]the cleaning stops the build-up of algae,
还能防止藻类的积聚 [00:55.43]so the turtle can swim freely.
所以海龟可以畅游海洋 [00:57.80]But it's also got to feel good.
但这一定也很舒服 [01:00.95]