标签：史前鳄鱼化石 相关文章
Study Confirms Unusual Fossils Came from an Animal Scientists say they have confirmed that strange-looking fossils from more than 500 million years ago are remains of an animal. 科学家们表示，他们已经证实来自5亿多年前的怪状化石是
2018年VOA慢速英语(十)月
A National Geographic researcher and his team have uncovered fossilized remains of 5 ancient crocodile species that lived among dinosaurs some 100 million years ago. One of the crocs had an oversized set of canines, and another had a snout like a duc
自然百科2009年
In the shadow of the Cerro Condor, a 600-meter-high limestone bluff in Patagonia, signs of life are few. But this wind-swept valley in Chubut province of Argentina is becoming one of the world's leading sites for paleontologists. Recent find showed t
自然百科2009年
A prehistoric watering hole. 一处史前水坑。 By using cutting edge technology, some of its fossilized secrets are scientifically decoded. 通过利用前沿科技，它的一些化石秘密如今已经被科学地揭开了。 Multiple species,
侏罗纪搏击俱乐部
Why Crocodiles Not Get Infections? Jill Fullerton Smith, a television producer, discovered why crocodiles can heal themselves in bacteria filled water. “In television we have to make films that ente
英语沙龙2004全年合辑下
When you think of alligators, the first words that come to mind probably aren't tender, loving and maternal. This video may make you think again. Here in the everglades, a mother alligator listens to the calls of her young as they hatch. Predators li
国家地理2007年
Almost ninety percent of all alligators die in their first two years of life, falling prey to other predators including their own. But normally they don't prey on humans, so why would an alligator attack a woman. Yovy Jimenez's fatal encounter is the
国家地理2007年
这看起来像是我们的祖先懂得收集有着锋利边缘，可以用来切肉的工具，就好像小孩子们懂得挑选扁平的石头用来打水漂一样。但是未来的考古工作致力于寻找把石头塑造成厨具的工具。相信
60秒科学
Here is what's going on as we look to Australia. Yes, that' what I call a croc. Wow! Yeah, fresh water crocodile, found in a public, public pool in Darwin, in Australia's Northern Territory. You dont likeˇ You have your own words about croc, Lisa? T
万花筒2011年
Fossil 化石 Fossils are the ramains of animals or plants. 化石是动物或植物的遗骸。 They are usually inside of rocks. 它们通常在岩体内。 They are typically more than ten thousand years old. 它们通常有一万多年的历史。
与美国小学生一起学英文第5册
Researchers Announce Discovery of Early Human Ancestor 研究人员称发现人类早期祖先化石 A group of scientists announced Thursday what they say is the discovery of remains from an early ancestor of human beings. 周三，一个科学家小组
2015年VOA慢速英语(九)月
Scientists have uncovered the world's largest snake. A study published in Thursdays edition of the science journal Nature reveals the discovery in Colombia. Measuring about 45-feet long and weighing more than a ton, the so-called Titanoboa would have
自然百科2009年
15 million years ago, New Zealand was a different place. The country was blanketed by dense rainforests and partially submerged under the ocean. Analysis of sedimentary(沉淀性的) rocks has shown that sea temperatures in this part of the world ros
自然百科2009年
Science and Technology 科技 Fossil feathers 羽毛化石 Not just for the birds 并非鸟类独有 A trove of fossils sheds light on the evolution of feathers 珍贵羽毛化石的发现能够更好地阐释羽毛的进化过程 THE fossil record i
经济学人科技系列
Scientists have found dinosaur-era feathers and evidence of them in fossil impressions before. 科学家早已发现了恐龙时代的羽毛，并拥有其印在化石上证据。 But this is the first time they've discovered a full-feathered tail se
英语新闻
A crocodile named Michael Jackson has been held responsible for killing a man at the Adelaide River on Monday afternoon.A 57-year-old man was attacked and killed by the crocodile in front of his wife while they were fishing at the river, about 60km e
英语新闻
I'm Bear Grylls. Whoo! 我是贝尔格里尔斯 I'm gonna show you what it takes to get out alive from some of the most dangerous places on earth. 我将让你知道如何 在地球上最恶劣的环境下 逃出生天 I've got to make it through a w
荒野求生
On October 9, Nature published a paper providing the results of new dating techniques that have been used to determine the age of prehistoric rock art motifs in volcanic caves on the island of Sulawesi in Indonesia. Archaeologists have determined tha
趣味英语
Amid rumors that there were prehistoric mammoths wandering around the unknown region and that somewhere in its wilds was a mountain of rock salt 80 by 45 miles in extent，the two captains set out. (同位语从句rumors that) 当时有一些传言，说
托福英语
Chapter 3 第三章 Prehistoric man 史前人类 Prehistoric man begins to make things for himself. 史前人类开始为自己制造工具 Early man did not know what time meant. 早期的人类不懂得时间的含义， He kept no records of birth
美国学生人类历史