英语听力：自然百科 虫虫兄弟—16

Ticks can spread a huge variety of diseases, and pass them all along at the same time through just one bite. Claw in the air as they search for a host, there is no hurry. Ticks can't fly and they crawl so slowly that their greatest skill is patience.

英语听力：自然百科 虫虫兄弟—15

The flower morph larva in the muesli get busy, spinning a web. In the process coating with cereal and sticky tendrils. Not very appetising. And seen under the scanning electro-microscope, the blue cheese Maria bought at the market looks even less app

英语听力：自然百科 虫虫兄弟—14

Most people don't expect the house cool from these beetles, but we should be thankful for their services. They can smell dead flesh from a staggering three kilometers away. When they find the corpse, they dress it first, coating it * and oral fluids

英语听力：自然百科 虫虫兄弟—13

She spun her snell with silkglands on the underside of her abdomen. The threads harden on contact with air. The trap's set, but she's treading carefully. The web's only sticky in places. She can move around, but others can't. The first bite of the da

英语听力：自然百科 虫虫兄弟—12

One down and a billion, the estimated population of cockroaches on the planet to go. The capture in one bug barely makes a difference, especially when the dust mites have landed. There are up to 100,000 of them living in one square meter of carpet. T

英语听力：自然百科 虫虫兄弟—10

This bee is carrying a deadly cargo, tiny parasitic mites called varroa. Even wings beating at 450 times a minute can't shake them off. The bee itself is in danger, and it's about to deliver a full cargo back to the hive along with the pollen. Back a

英语听力：自然百科 虫虫兄弟—9

It's 9 a.m. and while the wood lice are having a gasp on the dressing table, the trunk's been gutted from the inside out by this mighty homewrecker. Woodworms lay their legs in cracks and crevices and it can take the larva three years to grow into ad

英语听力：自然百科 虫虫兄弟—8

It's the ultimate high fiber diet. These creatures can even eat wool. They do have some saving graces. Just as dust mites clean up our dead skin, carpet beetles mop up the hair we shed, as well as any dead insects they find. But it's curtains for the

英语听力：自然百科 虫虫兄弟—7

But such tiny creatures, these sloppy feeders can carry many diseases. One of the worst on record is the Black Death, the great plague that swept across Europe，wiping out one third of the population. Breakfast shift over, the family heads off, ever

英语听力：自然百科 虫虫兄弟—6

Grain weevils are master safe crackers. Their battering ram shape snouts puncture most packaging. Like all insects, they don't have lungs but pump air through tiny pores on their outer skin. They don't like strong light, so layers of cereal couldn't

英语听力：自然百科 虫虫兄弟—5

Once the clothes make contact with human skin, so do the lice. They lay twice as many eggs as head lice, live twice as long and feed several times a day. If body lice drink blood infected with disease, they can pass that infection to humans through t

英语听力：自然百科 虫虫兄弟—4

Next door, Josh is the only one seemed to his business. All he feels is an itch, but invisible to the naked eye, a mite has get to go, too. Bloated with human skin, one mite can defecate about 20 pellets every day.And judging by the state of Danny's

英语听力：自然百科 虫虫兄弟—3

Woodlice set for the shadows, but other creatures are bolder. Outside a newcomer is looking for a way in, a male house spider. A water pipe is an opening invitation. It will take a lot more than a cold shower to deter this male on his hunt for a mate

英语听力：自然百科 虫虫兄弟—2

The ones which steal your food, share your bed, shred your clothes and eat your life. You don't need to leave the sofa to go on a survey. You just need a scanning electronic microscope to capture the action happening right under your nose and sometim

英语听力：自然百科 虫虫兄弟—11

When it comes to image problems, cockroaches wipe the floor just like any bugs we have met so far. they are fast, furious and one of the toughest creatures on earth. these are quick. They can move up to fifty body lengths per second. If we could do t

英语听力：自然百科 古格：消失的西藏王朝—1

West Tibet, the roof of the world. In the thin air, 6000 metres high, a vast area of wasteland as far as the eye can see. In this remote corner of western Tibet, lie the ruins of a mysterious kingdom - a kingdom whose army was feared by all its neigh

英语听力：自然百科 古格：消失的西藏王朝—8

Being so high also made the powers perfect strategic location, the sheer cliffs on three sides, and the steep summit made the city door virtually impregnable. (From here the slopes are very steep, any invaders would find it almost impossible to climb

英语听力：自然百科 古格：消失的西藏王朝—7

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英语听力：自然百科 古格：消失的西藏王朝—6

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英语听力：自然百科 古格：消失的西藏王朝—5

This is his land, and these are his people. Tsering has brought John Bellezza here to learn about acient tales and fables from his tribe elders. Tsering has become a collector of stories from Guge's past with the help of these elders. Oral legends pa