新东方背诵文选 L14 A Rare Fossil Record

The preservation of embryos and juveniles is a rate occurrence in the fossil record. The tiny, delicate skeletons are usually scattered by scavengers or destroyed by weathering before they can be foss

考研背诵50篇——14 A Rare Fossil Record

The preservation of embryos and juveniles is a rate occurrence in the fossil record. The tiny, delicate skeletons are usually scattered by scavengers or destroyed by weathering before they can be fossilized. Ichthyosaurs had a higher chance of being

《神奇树屋》 第三十九册 Dark Day In the Deep Sea 05 Ooze

The captain turned and stroked away. Sorry. Friends. Henry said to Jack and Anne. but captain in charge,he looked around, I see Joe and Tommy are helping the man bringup the catching now. as soon as they are free, I will ask them toback you to the sh

新东方现代文背诵篇章 A Rare Fossil Record

The preservation of embryos and juveniles is a rate occurrence in the fossil record. The tiny, delicate skeletons are usually scattered by scavengers or destroyed by weathering before they can be foss

英语听书《海底两万里》第505期 第31章 章鱼(12)

Its unstable color would change with tremendous speed as the animal grew irritated, 它身上的颜色不稳定，极其迅速，地随着这头动物的情绪激动程度变化而变化， passing successively from bluish gray to reddish brown. 从灰

60秒科学:鲸鱼祖先统治海洋多久？

《科学杂志》上的一项研究表明，硬骨滤食性鱼类用了10亿年的进化时间，占据了须鲸类现在的生态龛。另一项研究表明，鲸类的多样化取决于其食用的微生物类型。 Sometimes scientific discoverie

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205. The space shuttle航天天飞机 spacecraft-spectator There was an engineer who specialized in designing spacecraft. It was his job to meet specifications specified by NASA. He was involved in the design of the space shuttle, a spaceship specifi

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

2007年VOA标准英语-Farmers Use Llamas to Protect Sheep

By Margaret Kennedy Shenandoah Valley, Virginia 30 August 2007 Sheep producers in the United States face a growing problem with coyotes -- the wild dogs native to America's southwest that in recent decades have extended their range eastward. Agricult

VOA标准英语2008年-Australian, US Scientists Bring Extinct Gene Ba

By Phil Mercer Sydney 21 May 2008 Australian and U.S. scientists have successfully inserted a gene from the extinct Tasmanian tiger into a mouse embryo. They say the result has been bone and cartilage from the extinct marsupial developing inside the

VOA标准英语2014--把科学带进教室

SharkFinder Brings Science Excitement to Classrooms 把科学带进教室 Science is advanced by professional researchers and scientists. Yet, many believe that average citizens - including school children - can make contributions to scientific advan

美国国家公共电台 NPR Did Pox Virus Research Put Potential Profits Ahead of Public Safety?

SCOTT SIMON, HOST: There was an uproar in biology recently when scientists announced they'd used bits of DNA to manufacture a pox virus. Critics said the work is dangerous. Research teams had essentially published a recipe that could help terrorists

美国国家公共电台 NPR 6,000-Year-Old Knee Joints Suggest Osteoarthritis Isn't Just Wear And Tear

AILSA CHANG, HOST: When you get up in the morning, do you hear a snap, crackle, pop? We're not talking about cereal here. We are talking about your knees. Well, if you reach for the painkiller before that cup of coffee, you are in good company. There

美国科学60秒 SSS 2015-02-16

It has long been thought that mammoths and mastodons rambled over North American subartic grounds between 75,000 and 10,000 years ago, and were made extinct by hungry new arrivals on the scene, human beings. But new evidence indicates mastodons proba

【英语时差8,16】科学家在南极考察时发现巨大海洋生物

Scientists made surprising discoveries of giant-sized specimens of marine life during a major survey of New Zealand's Antarctic seas that ended recently. Huge sea snails, jellyfish with tentacles up to 4 meters long and starfish the size of big food

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Where else would the world's biggest dinosaur live, but in the world's trendiest town? Live may be stretching it a bit. Brachiosaurus brancai has been dead for 150 million years, but he remains impressive, towering more than 13 meters over visitors t

英语听书《海底两万里》第278期 第21章 在陆地上的两天(10)

Meanwhile I was examining this unusual bird. Conseil was not mistaken. 我于是检查一下这只奇异的鸟。康塞尔没有搞错。 Tipsy from that potent juice, our bird of paradise had been reduced to helplessness. 无双乌被豆寇汁迷醉了

英语听书《海底两万里》第268期 第20章 托列斯海峡(16)

He spotted a coconut palm, beat down some of its fruit, broke them open, 他看见一棵椰子树，打下树上好几个椰子，劈开来， and we drank their milk and ate their meat with a pleasure that was a protest against our standard fare on

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An excitable conchologist would surely have fainted dead away before other, more numerous glass cases in which were classified specimens from the mollusk branch. 一位神经稍微锐敏一点的贝壳类专家，到了另一些陈列软体类动物标

VOA常速英语2019--阿根廷科学家发现新型恐龙

There are spines, and then theres the Bajadasaurus pronuspinax. During the Cretaceous period, 140 million years ago, this dinosaur spotted a neck of dangerous-looking spines. Argentinian archaeologist Pablo Gallina discovered the unique specimen digg