新东方背诵文选 L17.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 evide

英文书摘精选 交配8-9个小时的生物

Don: All right, Yael, you're a moth. And mating for you is a big deal because it takes eight or nine hours. So the last thing you want is for some predator to interrupt you and your mate in the act. Yael: I'm guessing that's true not just for moths.

侏罗纪搏击俱乐部 第55期:在它们身边要小心为妙

Camarasaurus also owed its success to a set of long, spoon-shaped teeth that, paleontologists came to realize, could defoliate entire trees. 圆顶龙成功的另一个原因是（牙齿露出5厘米，含牙根8厘米）它们长长的匙状牙齿古生

侏罗纪搏击俱乐部 第35期:地面惊现黑色骨头

Fast forward 115 million years to the town of Bridger in south-central Montana. 推进到一亿一千五百万年前，在蒙大拿州中南部的布瑞杰镇。 It was paleontologist John Ostrum's last day of a summer searching for fossils. 正是古生

侏罗纪搏击俱乐部 第89期:史前怪物曾统治过地球

Ceratosaurus, although a pretty nasty predator, was not really suited for taking on adult size Stegosaurus or those long-necked sauropods found at the site. 角鼻龙，虽然是很凶残的掠食者，但肯定不适合攻击在石场发现的成年剑

侏罗纪搏击俱乐部 第97期:每个猎手都有适合自己的猎物

Being faster and more agile than your prey was an important attribute, but the ability to ambush prey was a even more lethal hunting strategy. 比猎物更快更灵活十分重要的品质，但伏击猎物是一个更为致命的狩猎策略。 Pred

侏罗纪搏击俱乐部 第106期:第一个冰河大陆块形成

Now, Ceratosaurus had appeared on earth long before the first Allosaurus showed up. 角鼻龙在地球上的出现远要早于最早的异特龙。 But towards the end of Jurassic, we find fewer and fewer skeletons of Ceratosaurus, but more and more

侏罗纪搏击俱乐部 第148期:无底洞穴意味着死亡

The lion's senses are keen.Its whiskers can pick up vibrations.So it can sense animals as small as a mouse in pitch darkness. 拟狮的感官很敏锐。它的胡须能感知振动。所以它能在漆黑一片的情况下感知到和老鼠一样小的

侏罗纪搏击俱乐部 第145期:攻击对手柔软的下腹

Modern bears are designed to hibernate. 现代熊要进行冬眠。 In the Ice Age, there were no seasonal weather changes, so bears ate the same amount all year round, giving it an insatiable need to hunt. 在冰期，没有季节性的气候变化，

侏罗纪搏击俱乐部 第143期:靠摸样吓跑对手

The bear was 4 meters tall, and weighed nearly a ton. 短面熊站起来有四米高，重量接近一吨。 Its paws were the size of a human head and its claws were 16 centimeters long. 它的脚掌有人的头那么大，爪子的长度达十六厘米

英语听力 暮光之城•暮色 第91期:第六章 惊悚故事(17)

What do you mean, 'civilized'? 你说的文明开化是什么意思？ They claimed that they didn't hunt humans. 他们声称他们不会狩猎人类。 They supposedly were somehow able to prey on animals instead. 以此类推，他们大概能在某

情景会话口袋书人际篇 第608期:接待客户(2)

5. I will show you the way. 我来领路。 还能这样说： Please follow me. This way, please. 谚语： The shortest way round is the longest way home. 欲速则不达。 6. Go ahead and have a seat, make yourself comfortable. 请随意找个位子

英语听力：自然百科 秋日黄石公园 Autumn—9

It cuts branches into more manageable lengths and then swims them down a network of purpose-built canals towards the dam. The pond to give this beaver protection from predators, and the canals allow it to forage far into the forest, carrying many tim

英语听力：探索发现 2012-09-21 长毛象王国 Mammoth—6

In one remarkable discovery recreated here, the head and hide of a large carcass was exposed a unique opportunity for scientists to tap some Ice Age secrets. The remains were of an extinct steppe bison, a longer-horned relative of the North American

英语听力：2013-06-28 《恐龙的战争》3 顽强防御—6

solid armor and dangerous weapons all deliver the power to stand up to huge predators. But in the world of Cretaceous, other defenders come equipped with tools not only to survive an attack but to defeat an opponent. Ankylosaurus is a herbivore desig

留美老师带你每日说英文 第964期:许多工作相对地缺乏意义

Secondly, many jobs are relatively meaningless because it's very possible, in the current economy, to generate profits from selling people things that aren't really helping them in any way, but are more hoodwinking them, or preying on their lack of s

【英语时差8,16】章鱼使用工具-上

Chimps do it. Dolphins do it. Even crows that want to catch fish do it. But an octopus? Yes, it seems the smartest member of the invertebrate world has learned how to use a tool. Octopuses have a reputation for being clever. They can figure out how t

【英语时差8,16】睡眠的意义

Pythons, bats and giant armadillos are among the longest sleepers at over 18 hours a day. Human babies need 16 hours, and most of us probably feel we need around eight hours sleep to function well. Professor Jerry Seigel, from the University of Calif

留美老师带你每日说英文 第403期:对于恐惧的反应

台湾籍旅美老师今天交给我们的句子是： For example, a fear reaction leads to a response of, say, running away from a predator that in turn, ensures your survival. 举例来说，对于恐惧的反应会导致一些行为，例如让你远

【英语时差8,16】狗比猫弱？（下）

Now, even small dogs are genetically programmed to function like predators, which makes sense considering they are close relatives of wolves. And birdsyou can probably figure out why the only way youd find out your bird is sick is when it dies. The s