英语听力：自然百科 冰冻星球 前往地球尽头—3

A male polar bear is searching for a mate. Willing females are few and far between. And the sea ice some of which he travels will soon melt and vanished. He's running out of time to find the mate in this frost frozen desert. Ten miles ahead, a single

英语听力：自然百科 海洋天堂大堡礁:堡礁内外—32

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英语听力：自然百科 海洋天堂大堡礁:堡礁内外—30

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英语听力：自然百科 徒步南非之克鲁格公园 The Kruger—8

It was a very thought of wandering these mountains that first attracted Brian. He's remained a firm fan even since. He's even written a book about the hotel's history and his experience here.-It's so different from anything else you can find anywhere

英语听力：自然百科 徒步南非之克鲁格公园 The Kruger—9

Day two, and rather worryingly, the weather doesnt seem to be improving. It also requires a painfully early start. Its an 18-kilometer round trip from the hotel to the summit, which most hikers tackle in one go, averaging eight to nine hours of stead

英语听力：自然百科 徒步南非之克鲁格公园 The Kruger—10

It's on foot. It's amazing how quickly you find yourself in isolation. There's nobody here, just the baboons. The morning mist seems to be pretty determined not to lift. No sooner have I begun to make progress on my walk, then the path ahead goes com

英语听力：自然百科 徒步南非之克鲁格公园 The Kruger—11

An unexpected break in the weather means I am able to make one more stab at the summit. -It's difficult to believe this is the same spot as yesterday without the rain. You can actually see. And look at that vista! With the spring back into my stab, t

英语听力：自然百科 徒步南非之克鲁格公园 The Kruger—12

Oh Julia,take a good look on the moutain.This is the last time you gonna see a full view of Cathedral Peak up until we get very close to it.And the best.So enjoy it.-How can you not enjoy it.-Enjoy it.Take it all in.-Nice cool bit of cloud. There's l

英语听力：自然百科 徒步南非之克鲁格公园 The Kruger—13

This is the halfway point of my walk today. It's been three hours since I started it out, some ideal spot for rest. I'm finally in the upper Berg.-So this is where people do in origins. -Yes. -Now I wish it's today though. I've come to realize this i

英语听力：自然百科 鲨鱼湾的海豚—27

Can you see that, there's a dolphin, dolphins, right down there. To spot dolphins immediately was really unexpected. Come back, let's go, quick ,quick. Ben and Nick, trying catch up with the dolphins. But soon find themselves tracing them up and down

英语听力：自然百科 海洋天堂大堡礁:堡礁内外—31

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英语听力：自然百科 北极熊 冰上间谍 Spy_Bear—16

But it's not enough. For a hunting bear, it doesn't get much worse than this. The seal could hardly fail to notice. But this battle-hardened seal is in no rush. Finally he gains some purchase, he's back in the game. He still believes he's in with a c

英语听力：自然百科 淘金沉船

Archaeologists in Canada's Yukon have found whats believed to be the only untouched shipwreck from the Klondike Gold Rush, made famous by writers Jack London and Robert Service. Underwater video, taken with a remote operated vehicle, shows the remark

英语听力：自然百科 纪念《物种起源》面世150周年

One of the most iconic animals of the Galapagos Islands is the Giant Tortoise. Charles Darwin wrote of this tortoise in his famed report , Origin of Species, published 150 years ago this month. The differences between the tortoises from island to isl

英语听力：自然百科 马尔代夫的未来

As dawn breaks, fishermen work furiously to hauling tuna. But while the fish may seem plentiful, there is trouble on the horizon. Fishermen were the fist to notice the alarming effects of rising sea temperatures. Beneath them the coral reefs are dyin

英语听力：自然百科 喜马拉雅冰川融化加剧

Mount Everest looms in the distance. Its snow and ice-capped peak gleams in the sunshine. The Himalayan glacier is a fragile ecosystem, which environmentalists warn could soon disappear. Greenpeace says that as global warning increases temperatures a

英语听力：自然百科 罕见的树袋鼠 -1

High in the northern mountains on the island of New Guinea, in the cloud forest lives an elusive animal found no where else in the world. (Hello!) With an endearing face and a thick fur, the Matschies tree kangaroos of Papua New Guinea（巴布新几内

英语听力：自然百科 罕见的树袋鼠 -2

Papua New Guinean Gabriel Porolak handles the captured male. He is the Tree Kangaroos Conservation Program Research Coordinator and a key figure in the local preservation effort. (Six kilograms.) The captured animal is weighed and examined by veterin

英语听力：自然百科 海洋天堂大堡礁:堡礁内外—28

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英语听力：自然百科 佛罗里达州的温泉（四）

The cormorant gives up for now. The bird has been foiled by the clarity of the water, the very thing that enables the manatee to thrive. The light through these waters helps plants flourish, and manatees are strict vegetarians. They can eat a hundred