纪录片《非洲》 第37期:刚果雨林（9）

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The lower mandible of their beaks¹ is greatly elongated².

他们的下喙长得非常长

They slice it through the surface of the water at ten metres a second.

他们能以每秒十米的速度划过水面

If and when it hits a tiny fish, it'll snap shut.

当下喙碰到小鱼时 会立刻合上

But why come up river to these open sand flats?

但为何要逆流而上到这片开阔的沙滩来呢

This is the answer.

这就是答案

But this nursery will not exist for long.

但这个托儿所无法长期存在

Four weeks from now, it'll be under ten metres of water.

再过4周 这里会被十米深的河水淹没

If by then these chicks can't fly, they will drown.

若到那时幼鸥仍不会飞 就会被淹死

The problem for young skimmers is that when they hatch,

幼小的剪嘴鸥在破壳而出时

the lower part of their beaks is the same size as the upper.

他们的下喙跟上喙一样长

While they wait for it to grow,

等待下喙长长的同时

they do their best to learn the skimming technique.

他们会努力学习捕食技巧

1 beaks   

n.鸟嘴( beak的名词复数 )；鹰钩嘴；尖鼻子；掌权者

参考例句：

• Baby cockatoos will have black eyes and soft, almost flexible beaks. 雏鸟凤头鹦鹉黑色的眼睛是柔和的，嘴几乎是灵活的。 来自互联网
• Squid beaks are often found in the stomachs of sperm whales. 经常能在抹香鲸的胃里发现鱿鱼的嘴。 来自互联网

2 elongated   

v.延长，加长( elongate的过去式和过去分词 )

参考例句：

• Modigliani's women have strangely elongated faces. 莫迪里阿尼画中的妇女都长着奇长无比的脸。
• A piece of rubber can be elongated by streching. 一块橡皮可以拉长。 来自《用法词典》