BBC听力 | 脆弱天堂 17
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Tuna are predators.
金枪鱼 是掠食性鱼类
They herd smaller fish to the surface, where they can be picked off one by one.
它们将小鱼赶到海面 在那里把小鱼逐一吞食
They are high-speed fish - the cheetahs of the ocean.
它们游动迅速－是大海里的猎豹
They're also the wildebeest
它们也是牛羚
They herd together in their thousands
常常成千上万地聚集
And undertake epic migrations across the Pacific in search of their prey.
并为寻找猎物 在太平洋各处 进行史诗般的迁移
If these animals lived on land
如果生活在陆地上
They'd be famous for providing the greatest wildlife spectacle on Earth.
它们将会因 为地球提供最壮丽的野生动物奇观而闻名
Instead, they're better known as a filling for a sandwich.
然而，现在人们更多地认识它们 是作为三明治的填充物
In an ocean with no marine reserves, migratory fish have nowhere to hide.
在没有海洋保护区的大海中 洄游鱼类无处藏身
Up to two kilometres long and 200 metres deep
长2公里深200米的大型围网
"purse seine" nets are designed to encircle schools of tuna.
被专门设计用来围捕金枪鱼
A fisherman checks his nets
被专门设计用来围捕金枪鱼
Breathing air pumped down a tube from the vessel above.
空气由一根管子 从上方的船泵压下来
It's not only tuna that get caught in these nets.
这些网捕捉到的 不只是金枪鱼
A lone turtle was in the wrong place at the wrong time.
一只孤独的海龟 在错误的时间来到了错误的地方
She can only hold her breath for a few minutes
它只能屏息几分钟
And the path to the surface isn't clear.
它辨不清往海面的路
She begins to panic.
它开始惊慌
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