BBC听力 | 火山列岛 21
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At the end of the last ice age,
上一次冰河时代结束时
large areas of this landscape became flooded as the ice melted.
随着冰川消融，这里大半没入了水中
In the process,over 70 marine lakes were created.
在这一过程中，诞生了七十多座海洋湖泊
Cut off from the outside world,these lakes produced some unique animals.
由于和外界毫无接触，这些湖泊造就了一些独特的生物
One of these was an ocean predator with long tentacles.
其中之一是挥舞着长触手的海洋猎手
But here,it evolved into a harmless,graceful wanderer.
但在这里，它演化成了一种无害而优雅的漫游生物
Jellyfish normally feed on small fish.
水母通常以捕食小型鱼类为生
But in the lakes,there was little prey.
然而，湖中猎物很少
So their bells have become a home to millions of tiny photosynthesising algae.
于是，它们的伞膜上寄生了无数微小的光合作用藻类
When exposed to sunlight,these algae produce sugars,
在光照充足的时候，这些水藻会制造出糖分
which in turn provide their hosts,the jellyfish,with food.
由此为它们栖身的水母提供了食物
Now,each day,the jellyfish migrate across the lake,
如今，水母每天在湖中漫游
following the arc of the sun.
追随阳光的足迹
Their only obstacle,the occasional anemone that tries to catch them as they float past.
它们遇到的唯一阻碍，是偶尔会有海葵想要抓住它们
And sometimes fails.
但有时并不成功
So,with little danger,and a never-ending supply of food,
就这样，由于环境安全，还有源源不断的食物供给
the jellyfish have multiplied,and multiplied,and multiplied.
水母数量开始成倍增长，不断增长，不断增长
It's strange to think that Palau was once just a piece of endless ocean.
很难想象帕劳群岛原本是一片漫无边际的汪洋
But nothing lasts forever.
然而万物并非一成不变
The never-ending rise and fall of land in the Pacific will continue to produce strange and wonderful worlds like these.
太平洋陆地永无休止地起隆起，沉陷，还将塑造更多这样奇异又美妙的世界
At the start of it all will always be the incredible natural force that created land here in the first place - the ocean volcano.
而这一切的开端，永远是那股神奇的自然力量，最初创造出陆地的力量——海洋里的火山。
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