万花筒 2013-01-01&0104 史上最暴力 长颈鹿之间的斗殴

Maybe the most violent giraffe fight ever caught on tape for those of you who keep track of such things.Stunning video from the discovery channel shows two giraffes using their 6-foot long necks as weapons to go after each other. ABC's Paula Faris ha

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 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

英语听力：自然百科 北极熊 冰上间谍 Spy_Bear—9

Its seaweed. Kelp is not wildly exciting, but it does contain carbohydrates and some protein too. The cub must find acrobatics rather strange. Hungry bears eat virtually anything. Its a question of making the most of whats around, and its never too s

漫画搞定六级词汇(音频+文本) 第103期

图片1 pray v. 祈祷，恳求，请 例句：They prayed that they would defeat their enemies soon. 他们祈祷很快打败敌人。 prey n. 被掠食者，牺牲者，掠食 vi. 捕食，掠夺，折磨 例句：Strong animals prey upon weaker on

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

英语博客-北美风情 195、To go out on a limb

Heres an episode about taking risks. Sooner or later, we all take a risk at work or in our personal lives. To go out on a limb and to stick your neck out can be used to talk about taking a risk. You can also put yourself in jeopardy when you take a r

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

美联社新闻一分钟 AP 冰盖减少北极熊捕食难

This is AP News Minute. President Trump is expected to clear the way for the publication of a GOP-authored memo, over FBI objections according to White House officials. The 4-page document alleges surveillance abuses during the FBI investigation into

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：自然百科 冰冻星球 前往地球尽头—15

The randoms of the sea ice are occupied by sun- bathing seals that have been here all winter. But the new arrivals're following the retreating ice edge and they have come here to hunt. Killer whales, the oceans' top predator. Killers are like wolves,

英语听力：2013-07-21 《恐龙的战争》3 顽强防御—16

Thats a wave of energy that could knock over a predator or at least discombobulate it, scramble its brains. Despite holding a deafening secret weapon, a Parasaurolophus, like other plant eaters, knows that the best way to stay alive is to keep predat

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：2013-07-19 《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

英语听力：2013-06-23 《恐龙的战争》3 顽强防御—4

Sometimes they even take on members of their own specie in a battle for dominance. Its primary weapon is a pair of a-meter-long horns mounted on its skull. These horns make those of modern creatures look lightweight. A rhinos horn is made of hair, an

英语听力：2013-07-03 《恐龙的战争》3 顽强防御—8

Interwoven layers can absorb the power of a piercing attack. Ankylosaurus pretty much was not afraid of anything because it would be very difficult to kill this beast. This creatures armor protects something else as well, its eyes. The eyelids of an

英语听力：2013-07-07 《恐龙的战争》3 顽强防御—10

19 meters tall and almost 30 meters long. Its neck alone is 4 stories long, a single vertebra almost as tall as a grown man. And a single thighbone weighs over half a ton. They seem to break all of the rules. Theres nothing like them around today. Co

ESL Podcast 505 – Teaching Children About Safety

Ms. Sanchez: Okay, kids. Im Ms. Sanchez, your substitute for this week. Im taking all of you on the field trip tomorrow. Listen up. There are some ground rules we need to go over . First, each of you will have a partner and you will hold hands while