With the spider exposed, it's now a battle between the wasp's paralyzing sting and the spider's jaws. But the wasp has quick reflex es. Cornered, the spider now plays its trump card. Hurling itself do

发表于:2018-12-07 / 阅读(82) / 评论(0) 分类 浩瀚沙漠

Africa is dominated by deserts, from the Kalahari in the south to the mighty Sahara in the north. These are fascinating worlds, each one unique, all a challenge. Yet life can conquer them and in the m

发表于:2018-12-07 / 阅读(53) / 评论(0) 分类 浩瀚沙漠

In this barren sea of sand, it's harder for larger animals to find enough to eat. You've got to be a real specialist, like the Namib sand snake. By sidewinding, it can swim its way up the dunes. But i

发表于:2018-12-07 / 阅读(73) / 评论(0) 分类 浩瀚沙漠

Pinning the ants to the hot sand surface, the spiders first cook them to death before dragging them under. In the Namib, even the toughest animals struggle with the heat. Gemsbok trek to the crests of

发表于:2018-12-07 / 阅读(60) / 评论(0) 分类 浩瀚沙漠

Each melon is a valuable package of moisture and seeds. The plant also benefits from this plunder as its seeds may be carried for fifty kilometers in the elephant's stomach before being dropped in a p

发表于:2018-12-07 / 阅读(65) / 评论(0) 分类 浩瀚沙漠

On certain nights, the secret is revealed. Warm, damp air moving in from the mid-Atlantic is transformed to fog as it crosses the cold coastal current. A vast blanket of moisture steadily rolls across

发表于:2018-12-07 / 阅读(69) / 评论(0) 分类 浩瀚沙漠

In spring , the desert undergoes a remarkable transformation. For just a few weeks a year, the flowers of over 3, 000 different plant species turn this desert into the Garden of Africa. This dazzling

发表于:2018-12-07 / 阅读(60) / 评论(0) 分类 浩瀚沙漠

Within a month, the spring blooms are finished. The plants now set their seeds, taking advantage of the warm summer winds which sweep the desert. For a while, the karoo just glows. But trouble is stir

发表于:2018-12-07 / 阅读(78) / 评论(0) 分类 浩瀚沙漠

EXPLORATIONS - Exploring Africa By Jerilyn Watson Broadcast: Wednesday, November 17, 2004 (MUSIC) VOICE ONE: I'm Faith Lapidus. VOICE TWO: And I'm Steve Ember with EXPLORATIONS in VOA Special English.

发表于:2018-12-15 / 阅读(50) / 评论(0) 分类 Explorations

Arabian camels and nomadic people are the most recent in a long line of Saharan pioneers. The history of this great region is told in ancient rock art, glimpses of a vanished world. Just a few thousan

发表于:2019-01-02 / 阅读(92) / 评论(0) 分类 浩瀚沙漠

The Arabian camel--not even a native , was domesticated in the deserts of Asia and brought to Northern Africa as a means of transport. In the past , Tuareg nomads used camels to move slaves, gold and

发表于:2019-01-02 / 阅读(92) / 评论(0) 分类 浩瀚沙漠

Teamwork has helped the weavers find a neat solution to the problems posed by the Kalahari sun. But some creatures are even better equipped. Ground squirrels have ready-made parasols. Under the shadow

发表于:2019-01-02 / 阅读(86) / 评论(0) 分类 浩瀚沙漠

Cheetah s are sprinter s, not made for a long-distance chase. So they must get close. But springbok have keen senses. True to their name, springbok can leap two meters high. It's jumping with a purpos

发表于:2019-01-02 / 阅读(93) / 评论(0) 分类 浩瀚沙漠

Living underground, mole rats are sheltered from the Kalahari's worst extremes of temperature. We think of deserts as hot places. But nightly temperatures can fall well below zero. At dawn, meerkat s

发表于:2019-01-02 / 阅读(80) / 评论(0) 分类 浩瀚沙漠

It’s the wettest of all African deserts, the great Kalahari. The sands of the Kalahari cover more of southern Africa than any other desert. But the higher rainfall here gives it a very distinctive a

发表于:2019-01-02 / 阅读(85) / 评论(0) 分类 浩瀚沙漠

But this hasn't always been so. Over the last 15 million years, Africa's climate has repeatedly swung from wet to dry and back again as Ice Ages have come and gone. At times the Kalahari has been much

发表于:2019-01-02 / 阅读(67) / 评论(0) 分类 浩瀚沙漠

...Africa. The African plate has been drifting north over millions of years. And when it pushes against the European plate, huge fold s of rock have been forced up and over one another into great moun

发表于:2019-01-02 / 阅读(162) / 评论(0) 分类 欧洲自然写真

By Luis Ramirez Bangkok 03 September 2007 Researchers say studies do not confirm whether wild birds are carriers of the H5N1 bird flu virus. VOA's Luis Ramirez reports from Bangkok, where experts are gathering this week to figure out better ways to t

发表于:2019-02-08 / 阅读(112) / 评论(0) 分类 2007年VOA标准英语(九月)

A hunter once had an old and faithful hound.For many years he had been the best dog in the pack,running more swiftly and catching more wild animals than all the others.A day came,however,when he was really too old to carry on any more.Aft

发表于:2019-02-11 / 阅读(95) / 评论(0) 分类 趣味英语

Ana: I heard that South Africa is famous for its wild animals. Mike: That's true. We have many different kinds of animals in South Africa. Have you heard of the big five? Ana: I think so but I don't remember what it is. Mike: So the big five are the

发表于:2019-02-27 / 阅读(77) / 评论(0) 分类 英语趣味课堂