Mighty carnivores ruled a dangerous world in the Cretaceous Period. But being a super predator like Tyrannosaurus Rex is not easy. Just surviving to adulthood is a major feat, one that takes a decade or more of killing and eating some of the meanest

发表于:2019-01-23 / 阅读(220) / 评论(0)

探索与发现2013年

英语听力：2013-06-12 完美捕食 Perfect Predators —18

Other carnivores are even more dependent on cognitive thought. For protection, Deinonychus relies primarily on its brain. --The brain structure of Deinonychus and its role are just really quite remarkable. Relatively speaking, Deinonychus has one of

发表于:2019-01-23 / 阅读(248) / 评论(0)

探索与发现2013年

英语听力：2013-06-07 完美捕食 Perfect Predators —16

I think that a big pterosaur on the ground wouldve been spooky because they would be moving around on all fours. Theyd probably have those sort of quick, precise movements like birds, but theyd be huge. Quetzalcoatlus lives by its own rules. Most mea

发表于:2019-01-23 / 阅读(303) / 评论(0)

探索与发现2013年

英语听力：2013-06-05 完美捕食 Perfect Predators —15

Nothing this large would achieve powered flight until the 20th century, 65 million years later. And Quetzalcoatlus still may hold the record for flight duration. Probably stay aloft for a week. Probably it could have gone for 25, 26,000 miles in a si

发表于:2019-01-23 / 阅读(238) / 评论(0)

探索与发现2013年

英语听力：2013-06-16 《恐龙的战争》3 顽强防御—1

In a prehistoric world, theres a war waging between herbivores and carnivores, and the plant-eaters are winning. They seem to break all of the rules. Theres nothing like them around today. For these plant-eating giants, survival relies on a battery o

发表于:2019-01-23 / 阅读(236) / 评论(0)

探索与发现2013年

英语听力：2013-06-14 完美捕食 Perfect Predators —19

--The irony for many predators is they are very concerned about injuring themselves. Even the toughest most well-armed man-eaters regularly come face to face with prey that can kill them. Whether you had the jaws of a Tyrannosaurus Rex, or are armed

发表于:2019-01-23 / 阅读(290) / 评论(0)

探索与发现2013年

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

发表于:2019-01-23 / 阅读(257) / 评论(0)

探索与发现2013年

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

发表于:2019-01-23 / 阅读(243) / 评论(0)

探索与发现2013年

英语听力：2013-06-30 《恐龙的战争》3 顽强防御—7

just probably you stay stinking machine walking its way to the forest. Digesting plant fiber is the hardest job. In the eco-system an Ankylosaurus tackle that job, which is why it needed that enormous bulk, gigantic stomach and some divided intestine

发表于:2019-01-23 / 阅读(247) / 评论(0)

探索与发现2013年

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

发表于:2019-01-23 / 阅读(242) / 评论(0)

探索与发现2013年

最新学习文章

热门学习文章

热门标签

英语听力 VOA标准英语 VOA 英语歌曲口语听力提高听力材料听力教程英语学习 NPR 英语口语 VOA慢速英语美国国家电台儿童英语 VOA英语小学英语 cnn VOA常速英语标准英语英文歌曲听电影学英语英语单词英文电影慢速英语 CRI 美联社新闻美国有线新闻加州分级澳洲新闻流行歌曲常速英语 ABC新闻快递疯狂英语英语读物听力棚车少年经济学人英语词汇商务英语 VOA双语新闻 BBC 中国电台大学英语 Treasures 加州语文 BBC英语英语听力网站 VOA英语教学词汇万花筒 SSS VOA英语听力 AP 新概念分级英语英语广播听力精选英语播客英文绘本 TED演讲赖世雄英语MP3 CCTV9英语新闻 lesson 英语新闻初中英语学英语英语语法历史上的今天英文广播剧英语游戏原版英语小说英语有声读物书虫英语牛津英语读物访谈录新闻一分钟考研英语英语每日在线听新闻 Us 新概念英语地道英语单词第二册自然百科高中英语 sports 实用英语 MP3听力辛沛沛 ESL英语第一册英语每日一句 unit 新东方 GRE 每日一词 BBC听力

学英语单词

aquaeductus endolymphaticus