学英语，英国B-B-C的经验是，“为什么不用学母语的方式学英语呢？”大家学母语都是先学说后认字的吧？听说应该先于阅读才对。
B-B-C的慢速英语收集整理了很多生活话题，它从身边事物入手，引导大家循序渐进学习，侧重于听力练习，让你不知不觉学会英语。
北极燕鸥是一种特别的鸟。迁徙时，它们从北极圈飞往南极圈，再飞回起点，整个旅程非比寻常，历时一年之久。这种鸟的迁徙路线在全球鸟类中属最长，但它们在途中也会停下来歇歇脚。北极燕鸥在英国北部繁殖，以北大西洋中部的鱼类为食，为漫长的旅程积攒体力。本期节目介绍这种鸟漫长而艰苦的迁徙之旅。
- 点击下方听音频
BBC英语-北极燕鸥的漫长迁徙之旅.mp3（需要私）
- 单词表
先听一遍，肯定有生词，不要紧，看看下面的单词表。
⇒tracking device 跟踪装置
⇒Arctic tern 北极燕鸥
⇒migration 迁徙
⇒Arctic Circle 北极圈
⇒Antarctic Circle 南极圈
⇒route 路线
⇒Northern hemisphere 北半球
⇒breeding 繁殖
⇒southward 向南地
⇒continent 大陆
⇒feeding ground 觅食地
⇒flight path 飞行路线
⇒wind system 风系
⇒round-trip 往返旅程
⇒lay 产（蛋）
⇒nest 鸟窝，鸟巢
⇒incubation 孵化
⇒hatch （雏鸟）孵出，破壳而出
⇒chick 雏鸟
⇒stop off 中途停留
⇒zooplankton 浮游动物
⇒beak （鸟）嘴，喙。
看英文原稿
学习了生词，回过头再听几遍，争取每句话都听懂，没听出来的对照下面的英文原稿。
Back in 2010, an international research team fitted tracking devices to birds they believed to be special – Arctic terns. And it turns out they were right, as described in US journal, PNAS. The Arctic tern has an extraordinary year-long migration from the Arctic Circle to the Antarctic Circle and back again.
What does this route look like? Arctic terns begin their migration in the Northern hemisphere in the summer, which is breeding season. As it gets colder and darker, turning to winter, the birds fly southward, parallel to the coast of South America or hugging the coast of the African continent to reach their winter feeding ground, the Antarctic Circle. And they do not always fly in a straight line. While heading back up north, their flight path mimics an S-shape which they follow to save energy while navigating the wind systems in the different hemispheres. This journey is a round-trip of up to 35,000km long, which makes the Arctic tern's migration the longest of any bird. Plus, they see more daylight than any other animal on Earth!
But, on this epic journey, the birds do take some well-deserved breaks. Heading northward, the population stops on the north and west coast of the UK to breed. A female lays one to three eggs in a nest, and after an incubation period of around three weeks, they hatch, and fluffy brown and grey chicks emerge. Meanwhile, the adult birds feed in the shallow coastal waters on fish, such as sand-eels. In contrast, while heading south, the birds appear to stop off in the middle of the North Atlantic Ocean, where they indulge on fish and zooplankton, preparing themselves for their long journey ahead.
So, if you ever see a little black and white bird with red legs and a red beak, show them some appreciation. They have flown a long way to see you!
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