SSS 2010-09-27
时间：2018-12-24 作者：英语课 分类：Scientific American(九)月
This is Scientific American’s 60-Second Science, I’m Christopher Intagliata. Got a minute?
City living has obviously influenced human culture—as have often been noted 1, how you gonna keep ‘em down on the farm after they’ve seen Paree'? But urban life may have also influenced human genes 3, making the descendants of ancient city dwellers 4 more resistant 5 to disease. That's according to a study in the journal Evolution.
The researchers started from the premise 6 that densely 7 populated cities would be good places for infectious diseases, which could spread easily from person to person. That situation should have set up selection pressure for the ability to survive such infections.
The scientists sampled the DNA 8 of 17 populations from Africa, Asia and Europe, including longtime urbanites—like Italians, Turks and Iranians—and traditionally rural or nomadic 9 groups, like Malawians or the Saami people of northern Scandinavia.
Then the researchers zeroed in on a gene 2 variant 10 that offers protection against diseases like tuberculosis 11 or leprosy. After controlling for any shared ancestry 12 between the groups, they indeed found that the protective gene was significantly more common in cultures with a long history of urban settlement. Which may be some comfort next time someone's sneezing near you on the subway.
- The local hotel is noted for its good table.当地的那家酒店以餐食精美而著称。
- Jim is noted for arriving late for work.吉姆上班迟到出了名。
- A single gene may have many effects.单一基因可能具有很多种效应。
- The targeting of gene therapy has been paid close attention.其中基因治疗的靶向性是值得密切关注的问题之一。
- You have good genes from your parents, so you should live a long time. 你从父母那儿获得优良的基因，所以能够活得很长。 来自《简明英汉词典》
- Differences will help to reveal the functions of the genes. 它们间的差异将会帮助我们揭开基因多种功能。 来自英汉非文学 - 生命科学 - 生物技术的世纪
- City dwellers think country folk have provincial attitudes. 城里人以为乡下人思想迂腐。 来自《简明英汉词典》
- They have transformed themselves into permanent city dwellers. 他们已成为永久的城市居民。 来自《简明英汉词典》
- Many pests are resistant to the insecticide.许多害虫对这种杀虫剂有抵抗力。
- They imposed their government by force on the resistant population.他们以武力把自己的统治强加在持反抗态度的人民头上。
- Let me premise my argument with a bit of history.让我引述一些史实作为我立论的前提。
- We can deduce a conclusion from the premise.我们可以从这个前提推出结论。
- A grove of trees shadowed the house densely. 树丛把这幢房子遮蔽得很密实。
- We passed through miles of densely wooded country. 我们穿过好几英里茂密的林地。
- 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。
- This tribe still live a nomadic life.这个民族仍然过着游牧生活。
- The plowing culture and the nomadic culture are two traditional principal cultures in China.农耕文化与游牧文化是我国传统的两大主体文化。
- We give professional suggestions according to variant tanning stages for each customer.我们针对每位顾客不同的日晒阶段，提供强度适合的晒黑建议。
- In a variant of this approach,the tests are data- driven.这个方法的一个变种，是数据驱动的测试。
- People used to go to special health spring to recover from tuberculosis.人们常去温泉疗养胜地治疗肺结核。
- Tuberculosis is a curable disease.肺结核是一种可治愈的病。