美国科学60秒 SSS 2013-06-28

Plants can choose where their seeds end up. Some float on the winds, others on the water. Many seeds hit the ride on or inside animals. And the farther seeds get from their parents and any predators of the disease the parent might have, the better ch

科学美国人60秒 SSS Moths Inspire Better Smartphone Screens

Moths Inspire Better Smartphone Screens 飞蛾帮你改进智能手机屏 One of the things that makes your smartphone so smart is that if you pull it out in the sun, it senses thatand dials up the screen brightness to compensate. But it's not a perf

科学美国人60秒 SSS 狼群需要更多生存空间

Wolves Need More Room to Roam狼群需要更多生存空间 Wolves are vital players in various ecosystems. So we humans need to develop a better tolerance for wolves. And the wolves need more space. Thats according to a new study in the journal Natu

人教全日制普通高中英语（必修）高三UNIT14-4

All animals are part of the food chain: they are listed on someone else's menu and always run the risk of ending up as someone else's lunch, dinner or snack. To protect themselves from being eaten and to survive in the wild, many animals have develop

考研背诵50篇——17.Evolution of sleep

Sleep is very ancient. In the electroencephalographic sense we share it with all the primates and almost all the other mammals and birds: it may extend back as far as the reptiles. There is some evidence that the two types of sleep, dreaming and drea

2008-10-27 肯尼亚偷猎状况恶化

This is Kenya's Masai Mara, one of Africa's great natural wonders, filled with a wonder of life. But these days political unrest has scared away many tourists. And fewer visitors means less revenue to protect the animals that live here. The nearly 6

VOA常速英语2018--林肯动物园150周年收到天鹅作贺礼

The history of Chicagos Lincoln Park Zoo started 150 years ago with a gracious gift from New York City officials, when the commissioners of the Board of Public Works of the city of Chicago received a gift of two pairs of swans from the commissioners

英语听力：自然百科 黄石公园的夏天 Yellowstone—7

Hot water scorches and drowns the roots of trees encroaching on the valleys. It can keep the forests in check and the rich pastures / open. Those pastures now produce the new grass needed to make rich milk and feed a bison baby boom. The few calves b

2006年VOA标准英语-Experts See Growing Internet Pornography T

By Dan Robinson Capitol Hill 04 April 2006 Robinson report - Download (MP3) 4.84MB Experts testifying before a congressional panel say the threat posed to children by sexual predators and the multi-bi

VOA常速英语2008年-Ancient Population of Little People Found on Pa

By Delia Robertson Johannesburg 12 March 2008 Scientists from a South African university have found evidence of a population of what they say were small-bodied modern humans on an island of Palau, east of the Philippines. VOA's Delia Robertson report

VOA标准英语2010年-Crawfish Could Help Louisiana's Seafoo

The ugly looking - but tasty - Louisiana crawfish is deeply linked to the state's culture and economy. Crawfish is related to shrimp, lobster and crabs. It grows in fresh water; the most common type is a seasonal favorite in the Mississippi Delta. No

VOA标准英语2013--Female Senators Lecture Military Chiefs on Sex Assault

Female Senators Lecture Military Chiefs on Sex Assault A recent documentary alleges the military is crawling with sexual predators, and a new Pentagon report shows a 35 percent rise in cases of unwanted sexual contact in the last two years. Both have

VOA标准英语2013--Final Vote Nears on Conserving Sharks

Final Vote Nears on Conserving Sharks Shark fin soup is a delicacy in Asia. But its popularity is helping to decimate shark populations. However, governments voted Monday (today) to protect five species of the predators. Preliminary approval came at

2016年CRI Investigation finds tourists responsible for fatal tiger attack at Beijing zoo

(source: CCTV) The investigation panel for the tiger attack at a wildlife park in Beijing late last month has confirmed that the tragedy was mainly caused by the actions of two visitors who ignored the warnings of a staff member and stepped out of th

美国科学60秒 SSS 2015-02-03

This is Scientific American 60 second science, I am Chris primsadiasher, got a minute? Study in birds for a living might sound like a cool job but it is not without logistical challenges for us land down animals. I have a northern gannet, so a really

英语听力：自然百科 大迁徙之繁衍生息 Need to Breed—5

Blood runs freely from slashed noses and necks. They even fight dirty, going for the eyes. The loser's breeding chances for now are ground into the sand. But this beachmaster's triumph is just the beginning of his troubles. Ahead lie dozens of fights

英语听力：自然百科 野性俄罗斯之西伯利亚 Siberia—14

But hot tempers on a hot rock beats being on the outside trying to get in. This exclusive resort, isnt accepting new guests. Come evening, a cool mist hangs over the lake, as the last of the egg-laying caddis flies get picked off by ducks and bears.

英语听力：2013-07-14 《恐龙的战争》3 顽强防御—13

the equivalent of a human being with a brain the size of a pea. Lobes for both sight and smell are tiny. Areas controlling information analysis, learning, and complex thought are barely developed. If you look at the size of their brain, you actually

英语听力：2013-07-17 《恐龙的战争》3 顽强防御—14

and interpreting sounds. Its called the auditory cortex. What was a surprise is the higher centers of their brain are very large and suggest that something very different is going on in Parasaurolophus and its kin than in most other of these plant-ea

英语听力：2013-07-19 《恐龙的战争》3 顽强防御—15

This tactic is still used today on the plains of Africa. If you look at various species of plant eaters, they live together in groups, and if one of them spots a predator, they can whinny or hoot and let the rest of the herd know, so that they can ke