英语听力：自然百科 美国总统华盛顿的往事

If George Washington really had chopped down a cherry tree, he would have done it here. And if he ever threw a stone across the Rappahannock River, then this is the spot. Both childhood stories have found their way into the legend of George Washingto

英语听力：自然百科 抹香鲸搁浅死亡

Rescuers in Australia worked around the clock Friday to try and save stranded sperm whales washed up on a sandbar off an Australian island. Wildlife officials say the whales beached on Thursday on the bank about 160 yards off Perkins Island in northw

英语听力：自然百科 世上最大的蛇化石

Scientists have uncovered the world's largest snake. A study published in Thursdays edition of the science journal Nature reveals the discovery in Colombia. Measuring about 45-feet long and weighing more than a ton, the so-called Titanoboa would have

英语听力：自然百科 白鲸

Meet Tiqa, the newest member of the beluga family at Vancouver Aquarium! The calf was born in June of last year. Tiqa spends her days training with the aquarium staff and swimming close to her mother Qila. In the wild, belugas live in Arctic and sub-

英语听力：自然百科 河豚

Sometimes a defeat can really be a victory. Let's begin with this puffer fish, minding its own business in this calm river delta in Tanzania, Africa. Entered the predator, in this case, our river otter, cousins of the Yellowstone sliders. Its trying

英语听力：自然百科 刚果河猛鱼

The Congo, stretches still unnavigated, its depths unknown, second only to the Amazon in flow. Here it is called the river that swallows all rivers. But below these angry waves, the Congo River has spawned an extraordinary number of bizarre creatures

英语听力：自然百科 山火

Transcript(by myconsent) The highest peaks of the Drakensberg reach up more than ten thousand feet. Most of the pastures up here are well above 6000. As soon as they arrive, the animals reap the rewards of the long hard climb -- the grass is sweet, n

英语听力：自然百科 夏威夷火山（下）

Hawaii was born in fire. It's islands born by volcanic eruptions. And in some places the fires still burn. On the Big Island, the island named Hawaii, Kilauea spills forth molten rocksin a daily spectacle of creation. The volcanos newest cone Puu Ōō

英语听力：自然百科 爱情鸟

Here in an umbrella thorn tree, in Tanzania, Africa, some Fischer's lovebirds are looking for a nice hollow in which to nest and raise their young. The lovebird is a small stout member of the parrot family. They are like humans and their location is

英语听力：自然百科 阿尔卑斯山的春天

When spring is no longer far away, the stags offer a curious spectacle. The greater the dignity, the funnier its loss. But even the loser seems to bear it with humour. The younger stags will soon look funny, too. And theres another piece of comfort.

英语听力：自然百科 爱情的奥秘

What is love? And can it potentially throw our senses out of balance? New advances in medical technology mean even the mysteries of love are becoming less mystical and more mechanical. Functional Magnetic Resonance Imaging (FMRI) is a procedure that

英语听力：自然百科 放生企鹅

Queuing like school children, these penguins are waiting to receive the life-saving medicines and nutrition. They owe their lives to SANCCOB, the Southern African Foundation for the Conservation of Coastal Birds. SANCCOB responded to a call for help

英语听力：自然百科 探秘玛雅金字塔

While Europe lingered in the Dark Ages, the splendor of the Maya world was reaching its zenith. Their temples soared hundreds of feet into the heavens. They developed a system of hieroglyphic writing. Works of art and sculpture displayed the Maya's i

英语听力：自然百科 温室效应威胁新物种

Researchers working for the World Wildlife Fund have warned that the effects of climate change pose a serious threat to rare species of wildlife discovered within the past year in Southeast Asia, including a fanged frog and a leopard-striped gecko. A

英语听力：自然百科 为何婴儿大多拥有蓝色眼睛？

Hi, its Kasey-Dee Gardner for Why? Tell Me Why? This week we received a question about baby eye color. The question was why are most babies born with blue eyes?. And I wasnt sure that was a true statement, but it is in fact a true statement. Actually

英语听力：自然百科 太阳能

The most powerful source of energy on the planet is actually out in space. It's our sun. More energy falls as sunlight on the US in a single day than it uses in a year. But it's been difficult to turn that sunlight into electricity. Many of us alread

英语听力：自然百科 人类与牛（下）

A barbecue taps into our hunter-gatherer of past. But eating beef no longer requires a life-and-death battle for the formidable adversary. 8000 years ago, something extraordinary happened to change all that. hunter-gatherer:采猎者，靠打猎和采集

英语听力：自然百科 人类与牛（上）

This is the animal we see grazing in a field as we drive along the highway. They have a timeless quality as if they have always been with us and we have always known them. In short, we take the cow for granted. John Webster, Professor of Animal Husba

英语听力：自然百科 Ireland 爱尔兰

This is the only horse race in the world to be run at the edge of the sea. Held once a year on Laytown Beach near Dublin, it reflects Irelands centuries-old love affair with the horse. Man has bred these horses for speed and endurance. He has left hi

英语听力：自然百科 Giving Fish a Bath 给鱼儿洗澡

The tropical night descends on a quiet beach, but just off shore, beneath the tranquil waves things are busy. A group of research scientists are scouring a coral reef looking for fish, or more accurately, the parasitic passengers attached to the fish