2012年商务英语考试媒体英语词汇(16)
Background: 在中国发现的一块小型恐龙化石标本改变了多年来科学家们对鸟类起源研究的理论。一个半世纪以来,研究人员一直认为始祖鸟是最原始、最古老的鸟类,但最新发现的标本有可能改变这一看法。考试用书
Archaeopteryx has a hallowed place in science, long hailed as not just the first bird but as one of the clearest examples of evolution in action. But in recent years, doubts have arisen as older fossils with similar bird-like features such as feathers and wishbones were discovered.
Now Chinese researchers believe they have finally knocked Archaeopteryx off its perch. They've discovered another similar species named Xiaotingia which dates back 155 million years to the Jurassic era.
By carefully analysing and comparing the bony bumps and grooves of this new chicken sized fossil with Archaeopteryx, scientists now believe that both are in fact feathery dinosaurs and not birds at all.
Professor Lawrence Witmer from Ohio University, who has written a commentary on the finding, says the discovery will have huge implications for our understanding of the origins of birds. Such are the similarities between these transition species of reptiles and birds that scientists involved with this latest finding say that it certainly won't be the end of the argument. Further discoveries may change and even restore Archaeopteryx to its former glory.
小编推荐:
下一篇:商务英语常用缩略词:I
一级建造师二级建造师二级建造师造价工程师土建职称公路检测工程师建筑八大员注册建筑师二级造价师监理工程师咨询工程师房地产估价师 城乡规划师结构工程师岩土工程师安全工程师设备监理师环境影响评价土地登记代理公路造价师公路监理师化工工程师暖通工程师给排水工程师计量工程师
执业药师执业医师卫生资格考试卫生高级职称执业护士初级护师主管护师住院医师临床执业医师临床助理医师中医执业医师中医助理医师中西医医师中西医助理口腔执业医师口腔助理医师公共卫生医师公卫助理医师实践技能内科主治医师外科主治医师中医内科主治儿科主治医师妇产科医师西药士/师中药士/师临床检验技师临床医学理论中医理论