音标:[ə'setifaiə] ;
n. 【化学】醋酸制造器;醋化器

Scientists at the Massachusetts Institute of Technology (MIT) have created what could be a breakthrough in providing clean, alternative energy. Researchers have invented an artificial leaf that splits water into hydrogen and oxygen and stores the ene

发表于:2018-12-07 / 阅读(276) / 评论(0) 分类 创新英语

THE PRESIDENT: Hello, everybody. Now, let me just comment, first of all, on the fact that I can't get the networks to break in on all kinds of other discussions -- (laughter.) I was just back there listening to Chuck -- he was saying, its amazing tha

发表于:2018-12-18 / 阅读(259) / 评论(0) 分类 美国总统演讲视频

Amber: Hello, I'm Amber, and you're listening to bbclearningenglish.com. In Entertainment today, we listen to an interview with a woman who - in the 1980s and 90s - put the word 'supermodel' in the dictionary! She's Elle Macpherson. Elle began her b

发表于:2018-12-19 / 阅读(320) / 评论(0) 分类 Entertainment

新编英语教程第四册unit02_2_Overcoming_Procrastination_A_Prac

发表于:2018-12-29 / 阅读(237) / 评论(0) 分类 新编大学英语阅读部分

20 The Historical Significance of American Revolution The ways of history are so intricate and the motivations of human actions so complex that it is always hazardous to attempt to represent events covering a number of years, a multiplicity of person

发表于:2019-01-02 / 阅读(583) / 评论(0) 分类 英语范文背诵20篇

Todays episode concerns a what-you-may-have-been-wondering-about topic. That sure was a mouthful, and it illustrates the problem of stacked modifiers, which occurs when you string together too many words to describe a noun at the end of the mouthful.

发表于:2019-01-02 / 阅读(248) / 评论(0) 分类 英语语法 Grammar Girl

Artificial Muscle Brings Back Blink A study in the Archives of Facial Plastic Surgery reports the development of an artificial muscle system that could restore the ability to blink to stroke and injury patients. Cynthia Graber reports Most of us blin

发表于:2019-01-02 / 阅读(324) / 评论(0) 分类 60秒科学

Grammar Girl here. Today guest-writer Bonnie Trenga is going to help us take a break from serious grammar and instead delve into the world of comedysome intentional, some not. Groucho Marx said it best: One morning I shot an elephant in my pajamas. H

发表于:2019-01-07 / 阅读(260) / 评论(0) 分类 英语语法 Grammar Girl

By Benjamin Sand Islamabad 25 February 2007 Foreign Ministers from seven Muslim nations met in Islamabad to discuss the deteriorating security situation in the Middle East. The conflict over Palestine as well as violence in Iraq and the growing tensi

发表于:2019-01-12 / 阅读(279) / 评论(0) 分类 2007年VOA标准英语(二月)

By Gilbert da Costa Abuja 27 August 2006 Two Nigerian army soldiers stand guard in Ikang, near Calabar in the Niger Delta area of Nigeria, Monday, August 14, 2006 Leaders in the Delta region of Nigeria are denouncing a security crackdown ordered by

发表于:2019-01-13 / 阅读(268) / 评论(0) 分类 2006年VOA标准英语(八月)

By Franz Wild Abidjan 24 May 2006 Charles Konan Banny greets villagers in Meagui In war-divided Ivory Coast disarmament and personal identification, the two obstacles to elections, saw partial success in a pilot program this week. There is little si

发表于:2019-01-13 / 阅读(284) / 评论(0) 分类 2006年VOA标准英语(五月)

Doctors Achieve Milestone Using Artificial Heart With No Beat In March, two doctors at the Texas Heart Institute in Houston achieved what medical experts call a major milestone by implanting a continuous-flow artificial heart in a human patient. The

发表于:2019-01-13 / 阅读(260) / 评论(0) 分类 VOA标准英语2011年(七月)

Scientists at the Massachusetts Institute of Technology have turned to Mother Nature for inspiration, inventing a device that mimics photosynthesis, the process plants use to convert sunlight and water into usable energy. MIT chemistry professor Dani

发表于:2019-01-14 / 阅读(286) / 评论(0) 分类 VOA标准英语2011年(四月)

By Al Pessin Honolulu, Hawaii 20 October 2009 Command of U.S. forces in Asia and the Pacific and Indian Oceans passed to a new commander on Monday at a ceremony in Honolulu, Hawaii. Navy Admiral Robert Willard said the U.S. commitment to the region

发表于:2019-01-14 / 阅读(201) / 评论(0) 分类 VOA标准英语2009年(十月)

Grammar Girl here. Today's topic is misplaced modifiers. Of all the writing errors you can make, misplaced modifiers are among the most likely to confuse your readers, but they're also kind of fun because misplaced modifiers can give your sentences s

发表于:2019-01-30 / 阅读(310) / 评论(0) 分类 英语语法 Grammar Girl

By Kurt Achin Seoul 14 June 2007 A Chinese official in Macau confirms North Korean funds have been transferred out of a bank there, en route to Pyongyang. The transfer removes a major obstacle in getting Pyongyang to fulfill its promise to begin dism

发表于:2019-02-07 / 阅读(210) / 评论(0) 分类 2007年VOA标准英语(六月)

Researchers have developed a method to activate electronic implants in the body and eliminate bacterial infections using a wireless signal。 研究者已经开发了一种运用无线信号激活人体中电子植入物来消除细菌感染的方法。

发表于:2019-02-08 / 阅读(234) / 评论(0) 分类 英语新闻

Deciding where to place a Wi-Fi router at home to minimise signal blackspots is a fine art. But a physicist has attempted to tackle the problem by mathematically working out the optimum position for a router. He studied how walls and reflections affe

发表于:2019-02-08 / 阅读(242) / 评论(0) 分类 英语新闻

U.S. military officials say they have identified the four Marines seen on video urinating on the bodies of dead Afghan Taliban fighters. The Naval Criminal Investigative Service, heading the main inquiry into the video, has also reportedly questioned

发表于:2019-02-08 / 阅读(305) / 评论(0) 分类 英语新闻

Leaders of the Greek and Turkish communities of Cyprus are starting a new series of negotiations aimed at re-unifying the divided island. Cypriot President Demetris Christofias and Turkish Cypriot leader Mehmet-Ali Talat have begun a series of three-

发表于:2019-02-11 / 阅读(273) / 评论(0) 分类 VOA标准英语2010年(一月)
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