SSS 2008-05-05
时间：2019-01-08 作者：英语课 分类：Scientific American(五)月
This is Scientific American's 60-Second Science, I’m Steve Mirsky. Got a minute?
Biologists often attempt to construct a genealogy 1 that shows the relationships of all life on earth. One well-accepted effort compares the nucleic acid sequences that code for ribosomal RNA and a few proteins in many different organisms. The result shows clear groupings. The bacteria cluster together, the eukaryotes—that’s you and frogs and maple 2 trees—all go together. And archae, a distinct kind of single cell, go together. A few years ago, researcher Song Yang decided 3 to look at similarly shaped regions of proteins in various organisms. Yang’s mentor 4, Russell Doolittle, discussed the work at an evolutionary 5 biology conference on May 1st at Rockefeller University in New York City. Yang compared the DNA 6 sequences of the similarly shaped protein sections. The resulting map of relationships almost completely matched the one made from different data sources. Which is good confirmation 7 that the genealogy of life on earth is indeed what researchers thought it was.
Thanks for the minute for Scientific American's 60-Second Science. I'm Steve Mirsky.
- He had sat and repeated his family's genealogy to her,twenty minutes of nonstop names.他坐下又给她细数了一遍他家族的家谱，20分钟内说出了一连串的名字。
- He was proficient in all questions of genealogy.他非常精通所有家谱的问题。
- Maple sugar is made from the sap of maple trees.枫糖是由枫树的树液制成的。
- The maple leaves are tinge with autumn red.枫叶染上了秋天的红色。
- This gave them a decided advantage over their opponents.这使他们比对手具有明显的优势。
- There is a decided difference between British and Chinese way of greeting.英国人和中国人打招呼的方式有很明显的区别。
- He fed on the great ideas of his mentor.他以他导师的伟大思想为支撑。
- He had mentored scores of younger doctors.他指导过许多更年轻的医生。
- 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。
- 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。
- We are waiting for confirmation of the news.我们正在等待证实那个消息。
- We need confirmation in writing before we can send your order out.给你们发送订购的货物之前，我们需要书面确认。