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5341 篇文章
Travelling 30 miles a day,
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Travelling 30 miles a day, 驯鹿日行30英里

They've been searching for days without a sign.
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They've been searching for days without a sign. 这些狼虽觅食多日 但一无所获

It's a long way to travel, but for a short period, the tundra is the ideal place for a grazer.
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It's a long way to travel, but for a short period, the tundra is the ideal place for a grazer. 北极的苔原虽然路途遥远, 但仍有短短的一段时间是食草动物的天堂

As soon as couples arrive, they must stake a claim to a nesting patch.
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As soon as couples arrive, they must stake a claim to a nesting patch. 一对雪雁来了之后就必须取得自己的筑巢地

It's a desolate, silent wilderness.
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It's a desolate, silent wilderness. 虽然此时是万籁俱寂,一片荒凉的景象

A frozen no-man's land at the end of the Earth.
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A frozen no-man's land at the end of the Earth. 那是地球边缘 天寒地冻 人迹罕至

But for a short time each year, the long, dark winter releases its grip.
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But for a short time each year, the long, dark winter releases its grip. 每年却总有短短的一阵日子 漫长阴暗的冬天也会放松它的钳制

0ne and a half billion swarm across the savannahs of Africa.
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0ne and a half billion swarm across the savannahs of Africa. 以15亿的数量聚集在非洲的稀树大草原上

Because it grows from a protected part at the base of its stems,
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Because it grows from a protected part at the base of its stems, 草茎的基部有很强的自我保护能力

Predators also have a hard time raising their young on open grassland.
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Predators also have a hard time raising their young on open grassland. 掠食动物在这片空旷的草地上繁衍后代也并不轻松