In science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produc

发表于:2018-12-01 / 阅读(185) / 评论(0) 分类 新东方现代文背诵篇章

1 emgenetics/em |n. |[U] a branch of biology dealing with heredity and genetic variations |遗传学 || ||Such work is considered essential in studying human genetics. |这种工作被认为在研究人类遗传学方面是很重要的。 || ||Advanc

发表于:2018-12-01 / 阅读(90) / 评论(0) 分类 新视野大学英语读写教程词汇 第四册

Tens of trillions of microbes call our living bodies home. But when we die? The first thing that happens is basically ecosystem collapsewhere you have a tremendous loss of diversity. Nathan Lents, a molecular biologist at John Jay College in New York

发表于:2018-12-02 / 阅读(134) / 评论(0) 分类 2016年Scientific American(十二)月

In science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced. A good example of this is found in the kinetic

发表于:2018-12-04 / 阅读(74) / 评论(0) 分类 考研背诵50篇

27. Scientific Theories In science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced. A good example of thi

发表于:2018-12-08 / 阅读(384) / 评论(0) 分类 新概念优美背诵短文50篇

Future Smart Devices Will Extend Our Senses Imagine shopping for clothes online and being able to run your hand across the screen on your computer or smartphone to feel the fabrics. That kind of simulation technology could be available within the nex

发表于:2018-12-16 / 阅读(94) / 评论(0) 分类 VOA标准英语2013年(二月)

Imagine that you spent your whole life at a single house.Each day at the same hour you entered an artificially-lit room,undressed and took up the same position in front of a motion picture camera.It photographed one frame of you per day,every day of

发表于:2018-12-31 / 阅读(102) / 评论(0) 分类 英语名著名段背诵精华

How Does Ice Cool Drinks? Heres something we tend to take for granted: drop a few ice cubes into a glass of water at room temperature, and in a few minutes the water will cool. How does this work? Heat is a measure of molecular activity: the faster a

发表于:2018-12-31 / 阅读(70) / 评论(0) 分类 英语听力文摘 English Digest

Why Does Plastic Wrap Cling To Itself? What makes kitchen plastic wrap cling so maddeningly to itself, and so conveniently to the sides of bowls and plates? Plastic wrap clings for two reasons: its elastic and its sticky. That probably seems pretty o

发表于:2018-12-31 / 阅读(85) / 评论(0) 分类 英语听力文摘 English Digest

利莎带着阿美在教室自习,阿美看到利莎桌上有那么多的书,她感到很震惊,于是两个人的对话就你一言我一句地展开了。 Listen Read Learn May: Are these your text books? Biochemistry, General Ecology, Botany, Cell Genetics, Molecular Genetics Lisa: Yes. I gott

发表于:2019-01-08 / 阅读(127) / 评论(0) 分类 英语口语大赢家

This is the VOA Special English Health Report. Evidence is increasing that common influenza viruses are becoming resistant to the main drug used to treat them. The drug is oseltamivir, also known as Tamiflu. The most common seasonal flu virus found

发表于:2019-01-11 / 阅读(91) / 评论(0) 分类 VOA慢速英语2009年(三)月

By Jessica Berman Washington 26 October 2006 An international consortium of scientists has completed work on deciphering the genome of the honey bee. They hope the work will lead to a better understanding of one of the earth's most social and ecolog

发表于:2019-01-12 / 阅读(173) / 评论(0) 分类 2006年VOA标准英语(十月)

By Mil Arcega Washington, D.C. 18 August 2006 watch Security report The alleged terror plot to use liquid explosives to bring down commercial jets over the Atlantic Ocean is fueling research into explosives detection technologies. Several U.S. compa

发表于:2019-01-13 / 阅读(151) / 评论(0) 分类 2006年VOA标准英语(八月)

Antibiotic Alternative Treats Urinary Infection in Mice Researchers have a new approach for treating urinary tract infections, a painful condition which can often be treated successfully with antibiotics. But many times, the infection is caused by st

发表于:2019-01-13 / 阅读(107) / 评论(0) 分类 VOA标准英语2011年(十一月)

Just below the Arctic Circle in northern Sweden sits a town called ?verkalix. Its home to only about a thousand people. But those inhabitants were the subject of a seminal study in human genetics. The research suggests it that what our parents, or ev

发表于:2019-01-20 / 阅读(68) / 评论(0) 分类 2015年Scientific American(十二)月

Bacteria Can Be Resistant to Brand-New Antibiotics 谁在对抗最新的抗生素 Perhaps the chief poster child of antibiotic resistance is methicillin-resistant Staphylococcus aureus, or MRSA. The bacterium is impervious to a suite of antibiotics,

发表于:2019-01-20 / 阅读(127) / 评论(0) 分类 2017年Scientific American(八)月

High-Sugar Diet Makes Flies Drop Like...Flies高糖饮食加速老化 I dont believe, in all my years, I have ever seen a fruit fly I would consider obese. But, thanks to the wonders of modern science, thats all about to change. Because a team of res

发表于:2019-01-20 / 阅读(111) / 评论(0) 分类 2017年Scientific American(六)月

By Tom Rivers London 07 October 2009 Ada Yonath (file photo) Two Americans and one Israeli share this year's Nobel Prize in Chemistry for their work showing how the DNA code is translated into life itself. Americans Venkatraman Ramakrishnan and Thom

发表于:2019-02-03 / 阅读(109) / 评论(0) 分类 VOA标准英语2009年(十月)

Mosquitoes Learn the Smell of Danger When it comes to sucking blood, mosquitos can play favorites: they show preferences for particular species or even certain individuals. At the same time, their tastes can change, depending on the circumstances. On

发表于:2019-02-13 / 阅读(120) / 评论(0) 分类 2018年科学美国人2月

Insects Donate DNA to Unrelated Bugs 昆虫捐献DNA给无关的虫类 You can thank your parents for your DNA. Because humans share genes through sexual reproduction, passing DNA from parent to child. It's known as the 'vertical transfer' of DNA. No

发表于:2019-02-13 / 阅读(103) / 评论(0) 分类 2018年科学美国人2月