[1] Overlooked in the arguments about the morality of artificially reproducing life is the fact that, at present, cloning is a very inefficient procedure. The incidence of death among fetuses and offspring produced by cloning is much higher than it i

发表于:2018-12-01 / 阅读(142) / 评论(0) 分类 《学会英语发音》初阶英语拼读系列 第六册

The woolly mammoth was a very large elephant-like mammal that lived on Earth several thousand years ago. Some mammoths grew to be four meters high and the largest weighed almost nine tons. Both male and female mammoths had very large tusks and walked

发表于:2018-12-03 / 阅读(48) / 评论(0) 分类 轻松英文阅读

Newly Discovered Bones Show Genetic Mix of Ancient Human Relatives Scientists say they have discovered the remains of an ancient female whose mother was a Neanderthal and whose father was Denisovan. Neanderthals and Denisovans are early human species

发表于:2018-12-08 / 阅读(67) / 评论(0) 分类 2018年VOA慢速英语(八)月

HAPPINESS has traditionally been considered an elusive and evanescent thing. To some, even trying to achieve it is an exercise in futility. It has been said that happiness is as a butterfly which, when pursued, is always beyond our grasp, but which i

发表于:2018-12-18 / 阅读(44) / 评论(0) 分类 英语美文

For many people summer equals tomatoes. Thats when folks can get their hands on gorgeous heirloom and traditional varieties, full of tomatoey flavor. Such tomatoes provide a stark contrast to year-round supermarket ones, famous for tasting like, well

发表于:2018-12-24 / 阅读(69) / 评论(0) 分类 Scientific American(六)月

[00:04.91]54) Anti-sense Technology [00:10.55]Research scientists have reported success in using an experimental method [00:17.97]called anti-sense technology to treat people with cancer. [00:23.41]For years, researchers have tested anti-sense techno

发表于:2018-12-26 / 阅读(84) / 评论(0) 分类 美国英语听力80篇

I remember going to Roseto for the first time, and you'd see three-generational family meals, all the bakeries, 我记得第一次来到罗赛托的时候,看到祖孙三代一起用餐, 看到很多面包师; the people walking up and down the s

发表于:2019-01-01 / 阅读(54) / 评论(0) 分类 异类:不一样的成功启示录

A 16-year-old girl, a high school student from New York, Anna-Sophia Boguraev, 一个16岁的女孩,一个来自纽约的高中生,Anna-Sophia Boguraev, wondered whether changes to the DNA of astronauts could be related to this immune suppressi

发表于:2019-01-03 / 阅读(46) / 评论(0) 分类 TED演讲科技篇

We are living on a planet with a lot of activities, with reference to our living environment,done by faith and guess alone. 我们对于这个地球上所发生的许多现象,都只是通过信念或猜测来认知。 Our lives depend upon these cre

发表于:2019-01-03 / 阅读(61) / 评论(0) 分类 TED演讲科学篇

受到鲍鱼壳的启发,安琪拉贝尔彻用病毒来制造人类能使用的优雅的纳米结构。通过定向进化挑选出高性能基因,她生产出一种病毒,这种病毒能构筑强大的新的电池、清洁的氢燃料和破纪录

发表于:2019-01-05 / 阅读(45) / 评论(0) 分类 TED公开课:环境 重造计划

This is Scientific American's 60-second Science. I'm Christie Nicholson. Got a minute? We might think perfect pitch is an innate talent. Well, a study in the American Journal of Human Genetics is providing some evidence for that. Perfect pitch, aka a

发表于:2019-01-08 / 阅读(69) / 评论(0) 分类 Scientific American(七)月

[00:03.13]Listen and Write 听一听,写一写 [00:09.13] [00:42.72]Sounds and Letters 字母与发音 [00:47.79]book书 foot脚 cookies饼干 [00:53.79]moon月亮 spoon勺子 food食物 [01:03.93]Listen for sounds 听发音 [01:08.08] [01:28.33]Read

发表于:2019-01-09 / 阅读(177) / 评论(0) 分类 北师大版小学英语四年级

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(64) / 评论(0) 分类 英语新闻

Scientists: Gene Editing Should Stay in Laboratories 科学家称基因编辑技术应该留在实验室 Scientists are debating how to limit their newly-discovered power to change genetic structure. Scientists already modify the genes of farm animal

发表于:2019-02-12 / 阅读(65) / 评论(0) 分类 2016年VOA慢速英语(七)月

清晨起来,一杯新鲜的研磨咖啡可以让人精力充沛。 A cup of freshly ground coffee is what it takes to get some people moving in the morning. 但一项最新的研究表明,这种功效可能是咖啡的香气而不是咖啡本身产

发表于:2019-02-13 / 阅读(55) / 评论(0) 分类 阅读空间

Sally and Gene were running late. It was a hot summer evening. It was even hotter in the underground subway station. Finally, the train arrived. It was crowded. The doors opened. Nobody exited. Sally tried to get inside. But a woman was standing near

发表于:2019-02-15 / 阅读(46) / 评论(0) 分类 英文短篇故事(纽约)

In the early days, this was an exceedingly painstaking process. 早年,这是个极费力气的过程。 Work on a single bacterium could easily consume a year. 研究一个细菌就可能一下子花掉一年时间。 At that time, according to Wo

发表于:2019-02-17 / 阅读(53) / 评论(0) 分类 万物简史

Viruses prosper by hijacking the genetic material of a living cell and using it to produce more virus. 病毒掠夺活细胞的基因材料,用来制造更多的病毒,从而大量生长。 They reproduce in a fanatical manner, then burst out in

发表于:2019-02-17 / 阅读(43) / 评论(0) 分类 万物简史

Adrienne: Hey, Ian, tell me about the time you were at the hospital. 埃德里安娜:嗨,伊恩,跟我说说你第一次去医院是什么时候吧。 Ian: What, the first time I went to the hospital? 伊恩:什么,我第一次去医院?

发表于:2019-02-20 / 阅读(92) / 评论(0) 分类 实战口语情景对话

If the axis-tilt theory had been refuted, 倘若地轴倾斜理论被观察否定了 its defenders would have had nowhere to go. 它的支持者们就无路可退了 No easily implemented change could make that tilt 没有什么信手拈来的变动能

发表于:2019-03-04 / 阅读(89) / 评论(0) 分类 TED演讲教育篇