可可推出小学英语课本点读APP,欢迎下载

口语提升

能力提升

综合

手机APP下载

您现在的位置: 首页 > 在线广播 > VOA慢速英语 > VOA慢速-科技报道 > 正文

VOA慢速英语(翻译+字幕+讲解):霸王龙从儿童大小的恐龙演变而来

来源:可可英语 编辑:aimee   VIP免费外教试听课 |  可可官方微信:ikekenet
 下载MP3到电脑  批量下载MP3和LRC到手机
加载中..
tq#a%rWj&Vc9D~)D

yDDja0nSCY(t3Z8@lI

Tyrannosaurus Rex Developed from a Child-Sized Dinosaur
History's most frightening dinosaur, the Tyrannosaurus rex, came from a long line of smaller creatures.
Scientists have identified a new relative of the Tyrannosaurus rex, also known as T. rex. Scientists say this relative was only about one-meter high, the height of a small child.
American Sterling Nesbitt, a paleontologist, discovered the dinosaur. He told the Associated Press that if the ancient creature raised its head, an adult human maybe "would be looking at it in the eye."
Nesbitt is with the Virginia Polytechnic Institute and State University in Blacksburg, Virginia. In 1998, he found the creature's remains while serving as a volunteer on a dig in New Mexico with a famous paleontologist. At the time, Nesbitt was just 16 years old.
For about 20 years, scientists were not sure what to make of the remains, until other small relatives of T. rex were discovered.
"The small group of tyrannosauroid dinosaurs would give rise to some of the biggest predators that we've ever seen," noted Nesbitt. He is the lead author of a report of the bones. The findings were published earlier this month in the scientific journal Nature Ecology and Evolution.

gA_#4*FQE;x0OJ4stgRe

黑兹尔郊狼暴龙复原图.jpg
The new dinosaur is called Suskityrannus hazelae. The name comes from a word in the language of the Zuni, a Native American tribe. It describes another small, but modern predator: the coyote.
Scientists say the dinosaur dates back 92 million years, about 20 million years before the T. rex walked the Earth. The newly discovered cousin weighed between about 20 and 40 kilograms. It was three times longer than it was tall. That is almost nothing compared to the nine-ton T. rex.
Suskityrannus hazalae is not the first or even smallest member of the Tyrannosaurus family tree. But Nesbitt said it provides the best example of how this family of smaller dinosaurs evolved into the frightening star of movies and television shows.
Hans-Dieter Sues is a paleobiologist with the Smithsonian Institution in Washington. He suggested it was an important find.
"Suskityrannus is the first really good record of the early tyrannosaurs in North America," he wrote in an email. He was not involved in the study.
Scientists are not sure why these meat-eaters were not especially big compared with other dinosaurs alive at the time. So it is unclear why they later evolved to be so huge.
Nesbitt said the newly discovered species is probably among the last of the little dinosaurs. It was bigger than earlier members of the species and had big feet needed for speed — something the T. rex lost.
I'm Jonathan Evans.

uj%4BJUe=#]

6M^zheu3r,QIS&9g7=l

&uh!~Js%psBKg4&9=yhO4r*gIGTcVnYBv-=DQT_iEZeAcPvdDRb4Nu

保存到QQ日志   登录QQ空间
重点单词   查看全部解释    
addiction [ə'dikʃən]

想一想再看

n. 沉溺,上瘾

 
ecology [i:'kɔlədʒi]

想一想再看

n. 生态学

 
frightening ['fraitniŋ]

想一想再看

adj. 令人恐惧的,令人害怕的 动词frighten的

 
institution [.insti'tju:ʃən]

想一想再看

n. 机构,制度,创立

联想记忆
institute ['institju:t]

想一想再看

n. 学会,学院,协会
vt. 创立,开始,制

联想记忆
paleontologist [,pæliɔn'tɔlədʒist]

想一想再看

n. 古生物学者 =palaeontologist

 
dependence [di'pendəns]

想一想再看

n. 依赖,信赖,上瘾

联想记忆
predator ['predətə]

想一想再看

n. 食肉动物,掠夺者

联想记忆
identified

想一想再看

adj. 被识别的;经鉴定的;被认同者 v. 鉴定(id

 
species ['spi:ʃiz]

想一想再看

n. (单复同)物种,种类

 

关键字: 霸王龙 科技 VOA慢速

发布评论我来说2句

    特别推荐

    英语学习推荐

    • 英语听写训练
      听写强化训练系统有听写比对,按句停顿,中文翻译、听写错词提示等特色功能.
    • 可可英语微信:ikekenet
      关注可可英语官方微信,每天将会向大家推送短小精悍的英语学习资料..

    科学美国人60秒

    可可英语官方微信(微信号:ikekenet)

    每天向大家推送短小精悍的英语学习资料.

    添加方式1.扫描上方可可官方微信二维码。
    添加方式2.搜索微信号ikekenet添加即可。