低成活力突变(致死率在50%以下而生存率低于标准型的突变)

Mummies Contain Clues to Colon Cancer 木乃伊包含了结肠癌的线索 From VOA Learning English, this is the Health and Lifestyle report. Colon cancer is linked with obesity, lack of exercise, and a poor diet high in processed foods. However, sc

发表于:2018-12-16 / 阅读(73) / 评论(0) 分类 2016年VOA慢速英语(三)月

Last Woollies Had Mammoth Mutations 长毛象灭绝的真正原因是 In their heyday, woolly mammoths blanketed the Siberian steppe, Alaska and large parts of North America. But by 10,000 years ago, warming climates had turned many of the grasslands

发表于:2018-12-24 / 阅读(80) / 评论(0) 分类 2017年Scientific American(六)月

Evolving Toward Cancer Is it possible that humans evolved to get cancer? Thats what scientists at Ben Gurion University in Israel claim in a study. They found that the same genetic mutations involved in the evolution of modern humans also gave rise t

发表于:2018-12-27 / 阅读(53) / 评论(0) 分类 英语时差8,16

模仿文本: That was a headline on September 5th, the end of the concept of junk DNA. Actually, geneticists had long abandoned the idea that our genomes are riven with all the rubbish. But what was once called junk was largely still unexplored. 译

发表于:2018-12-28 / 阅读(115) / 评论(0) 分类 英音模仿秀

说一口流利的英语,从简单的单词开始。 听听,读读,背背,今天你的词汇量又增加了5个。 单词/词义 中英例句 单词听读 step [ step ] He took a step towards t

发表于:2018-12-30 / 阅读(114) / 评论(0) 分类 每日攻克5词

Science and technology. 科技。 Salt-tolerant rice. 耐盐大米。 Nuclear-powered crops. 核动力粮食。 Physics meets biology in a project to breed better strains of rice. 物理学与生物学的碰撞--优质大米培植。 THOSE who turn t

发表于:2018-12-31 / 阅读(121) / 评论(0) 分类 经济学人科技系列

《绝望主妇》原句: We have to get rid of the car. But we cant sell it. The police might find it, and there could be DNA. 单词词组讲解 Get rid of sth/somebody 摆脱 发音讲解 Get rid of 的t吞音,d连读 最后翻译: 我们必须把

发表于:2018-12-31 / 阅读(133) / 评论(0) 分类 小紫带你轻松学美剧

This is scientific American's 60-Second Science, I'm Karen Hopkin, this'll just take a minute. If theres anything better than a fresh, ripe, tomato, its a gigantic fresh, ripe tomato. And thanks to a couple of mutations, thats exactly what we all enj

发表于:2019-01-08 / 阅读(135) / 评论(0) 分类 Scientific American(五)月

Mutation 突变 Do you know about mutations? 你知道突变吗? A mutation happens when the DNA structure in a gene changes. 当基因的DNA结构发生变化时就会发生突变。 Once a mutation happens, the change can't be reversed. 突变一旦

发表于:2019-01-10 / 阅读(120) / 评论(0) 分类 与美国小学生一起学英文第12册

This is the VOA Special English Health Report. Every year, one million women around the world are found to have breast cancer. Almost two hundred thousand others are told they have ovarian cancer. The decisions for treatment are more difficult when t

发表于:2019-01-12 / 阅读(105) / 评论(0) 分类 2010年VOA慢速英语(九)月

Each year, scientists work to develop a unique influenza vaccine to protect people against the strain expected in the coming flu season. Mutations in the virus mean that last year's vaccine probably won't protect against this year's flu variety. Now,

发表于:2019-01-13 / 阅读(130) / 评论(0) 分类 VOA标准英语2010年(七)月

In laps,bacteria may swim freely,but out in the world,including our bodies,bacteria often exist packed together in dense communities called biofilms. and these configurations can help them cause illness.finding clues about how such bacteria gro

发表于:2019-01-20 / 阅读(95) / 评论(0) 分类 Scientific American(八)月

Fans of classic movies will remember the famous dueling banjos scene in Deliverance, the story of four city friends who take an ill-fated boating trip down a backwoods Georgia river. As the friends set out, one of the friends challenges a local boy w

发表于:2019-01-22 / 阅读(62) / 评论(0) 分类 英语时差8,16

❤ 模仿文本:Well we know that all cancers originally arise from one abnormal cell that has gone to the bad that's started to grow when it shouldn't grow to proliferate and to invade. And the reason that that happens is because mutations have a

发表于:2019-01-23 / 阅读(77) / 评论(0) 分类 英音模仿秀

Cancer therapy 癌症治疗 Taking aim sooner 即将实现对症下药 If personalised medicine is to achieve its full potential, it should be used earlier on in clinical trials 若想让个体化药物发挥最大潜力,那就应该尽早将它投入

发表于:2019-01-26 / 阅读(156) / 评论(0) 分类 经济学人综合

This is the VOA Special English Agriculture Report. Soybeans are eaten by people and fed to animals. Some farmers grow them to replace lost nitrogen in the soil. Soybeans were first grown in Asia thousands of years ago. Now scientists have a full gen

发表于:2019-01-31 / 阅读(96) / 评论(0) 分类 2010年慢速英语(二)月

Scientists say they have made a leap in knowing why some people retain their youthful looks while others age badly. 科学家称他们已经在探究为什么有的人青春长驻而另一些人逐年老去这一问题上取得突破性进展。 They

发表于:2019-02-01 / 阅读(79) / 评论(0) 分类 阅读空间

The number of people living past 100 has soared by 71 per cent in the past decade. And while one expert believes this figure will continue to rise, he stated that anyone hoping to live for double or triple this time will be disappointed. Speaking at

发表于:2019-02-05 / 阅读(109) / 评论(0) 分类 英语新闻

Autism 自闭症 Why it's not Rain Woman 为什么它不是雨女 Women have fewer cognitive disorders than men do because their bodies are better at ignoring the mutations which cause them 与男性相比,患有认知障碍的女性较少,因为她

发表于:2019-02-16 / 阅读(79) / 评论(0) 分类 经济学人科技系列

The anatomy-related adaptations were those that seemed to control the development of the pandas second thumbs. 与生物体结构相关的基因有可能控制熊猫第二拇指的生长。 Two genes in particular, DYNC2H1 and pericentrin, have mutat

发表于:2019-02-16 / 阅读(84) / 评论(0) 分类 经济学人科技系列
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