考研距离我们已经越来越近了，为给考研学生提供方便，威廉希尔app 为您提供以下学习资料。希望对您有所帮助！
 

Hard to digest

不好消化

Jun 2nd 2006

From The Economist print edition

BACTERIA, like people, can be divided into friend and foe. Inspired by evidence that the friendly sort may help with a range of ailments[1], many people c________① bacteria in the form of yogurts and dietary supplements.(1) Such a smattering[2] of artificial additions, however, represents but a drop in the ocean. There are at least 800 types of bacteria living in the human gut. And research by Steven Gill of the Institute for Genomic Research in Rockville, Maryland, and his colleagues, published in this week's Science, suggests that the collective genome of these organisms is so large that it contains 100 times as many genes as the human genome itself.

细菌和人一样也有敌我之分。有益的细菌有助于防治多种疾病已经得到证实，这使得许多人都食用细菌制成的酸奶以及补品。然而，人为地补充这么一点点，只能是杯水车薪。人消化道内生活着至少800种细菌。马里兰州洛克威尔基因组研究中心的史蒂文·吉尔及其同事们在本周《科学》杂志上发表的一篇研究报告认为，这些生物体有着庞大的宏基因组，所包含的基因总数是人类基因组的100倍。

Dr Gill and his team were able to come to this conclusion by extracting bacterial DNA from the faeces of two volunteers. Because of the complexity of the samples, they were not able to reconstruct the e_______② genomes of each of the gut bacteria, just the individual genes. But that allowed them to make an estimate of numbers.

吉尔博士和他的研究小组是通过提取两位志愿者粪便中的细菌DNA后得出这一结论的。鉴于标本的复杂性，他们无法重建消化道所有细菌的全部基因组，而只构建了个别基因。但这使得他们能够对基因总数作出估计。

以上便是为备战考研的你提供的辅导资料，要想浏览更多，请点击 ： 考研辅导频道 英语栏目
相关推荐：
2013年英语语法练习题及详解
研英语作文常用短文高分句型--常见起始句型
2013年考研英语作文常用短文高分句型--常见起始句型
2013年考研英语读译参考复习资料--另类热情拥抱
考研英语辅导 翻译常见误区