SSS 2008-06-27
时间：2018-12-24 作者：英语课 分类：Scientific American(六)月
This is Scientific American's 60-Second Science, I am Cynthia Graber. This'll just take a minute.
For the last five years, researchers have been analyzing 1 bird DNA 2. That effort has now completely altered our understanding of which bird species really do flock together in evolutionary 3 history. The overall project is called Assembling the Tree of Life, with the avian part known as Early Bird. The new relationships appear in the June 27th issue of the journal Science. It turns out much of what we thought about how bird species were related to one another was just wrong. For example, scientists thought that birds that live on water, like flamingos 4, evolved from a separate waterbird group. But flamingoes took to the water after speciating. And it might make sense to think that birds with similar lifestyles, like falcons 5 and eagles, were related. Nope. Instead, falcons are more closely related to parrots. Rearchers found other surprising relatives—colorful hummingbirds 6 that flit about when the sun shines descended 7 from drab, nocturnal nightjars. Get ready for Latin species names to change. And textbooks and field guides will have to be revised to correct former assumptions about relationships. The 82 million American birdwatchers will certainly go cookoo.
Thanks for the minute for Scientific American's 60-Second Science, and I'm Cynthia Graber.
- Analyzing the date of some socialist countries presents even greater problem s. 分析某些社会主义国家的统计数据，暴露出的问题甚至更大。 来自辞典例句
- He undoubtedly was not far off the mark in analyzing its predictions. 当然，他对其预测所作的分析倒也八九不离十。 来自辞典例句
- DNA is stored in the nucleus of a cell.脱氧核糖核酸储存于细胞的细胞核里。
- Gene mutations are alterations in the DNA code.基因突变是指DNA密码的改变。
- Life has its own evolutionary process.生命有其自身的进化过程。
- These are fascinating questions to be resolved by the evolutionary studies of plants.这些十分吸引人的问题将在研究植物进化过程中得以解决。
- Flamingos stand in a salt lake in Larnaca, Cyprus. 塞浦路斯的拉纳卡市一个盐湖中的火烈鸟。 来自互联网
- The research started researchers studied greater flamingos and in a bird sanctuary in southern Spain. 研究人员在西班牙南部的一个鸟类保护区对大型火烈鸟进行研究。 来自互联网
- Peregrine falcons usually pluck the feathers and strip the flesh off their bird prey. 游隼捕到鸟类猎物时，通常是先拔掉它们的羽毛，再把肉撕下来。 来自《简明英汉词典》
- Though he doubted the wisdom of using falcons, Dr. de la Fuente undertook the project. 虽然德·拉·富恩特博士怀疑使用游隼是否明智，但他还是执行了这项计划。 来自辞典例句
- Hummingbirds have discovered that nectar and pollen are very nutritious. 蜂鸟发现花蜜和花粉是很有营养的。
- Why do hummingbirds and gorillas both have backbones? 为什么蜂鸟和大猩猩都有脊骨？