Over time I have been changed quite a lot. I began as a calculating machine in France in 1642. Although I was young I could simplify difficult sums. I developed very slowly and it took nearly two hundred years before I was built as an analytical mac

发表于:2018-12-29 / 阅读(155) / 评论(0) 分类 高中一年级英语

In The Past, Insects Were Huge! Once upon a time, hundreds of millions of years ago, many insects were much larger than they are today. Scientists have found fossilized remains of dragonflies with wingspans several feet in diameter. Other insects wer

发表于:2018-12-31 / 阅读(55) / 评论(0) 分类 英语听力文摘 English Digest

Bubbles. Big ones entertain children and tiny ones tickle champagne aficionados. Even witches appreciate what they bring to a boiling cauldron. If you, too, are a bubble lover, then youll enjoy the latest bubble study published in the journal Nature.

发表于:2019-01-02 / 阅读(109) / 评论(0) 分类 60秒科学

By Brian Wagner Miami, Florida 15 August 2007 U.S. minority population are expanding New data from the U.S. Census Bureau shows that black, Asian, Hispanic and other minority populations are expanding in many districts where whites were once dominant

发表于:2019-01-07 / 阅读(157) / 评论(0) 分类 2007年VOA标准英语(八月)

By Raymond Thibodeaux Cavelossim Beach, Goa, India 07 April 2008 Top media and advertising executives are touting the rise of the India's smaller cities and towns as the country's fastest-growing consumer market. Raymond Thibodeaux files this report

发表于:2019-01-07 / 阅读(73) / 评论(0) 分类 VOA常速英语2008年(四月)

By Steve Schy Turin 18 February 2006 While most American journalists covering the Turin Olympics get around on buses, sometimes the buses get stuck in congestion created by swarms of smaller cars. It

发表于:2019-01-07 / 阅读(101) / 评论(0) 分类 2006年VOA标准英语(二月)

Crampfish became famous thanks to the movie Finding Nimo. In real life, their social hierarchy is simple, larger fish dominate their smaller counterparts. Now we know that to reinforce the social structure, the fish communicate with aggressive and su

发表于:2019-01-08 / 阅读(49) / 评论(0) 分类 Scientific American(十一)月

For many Olympic sports, attention comes just once every four years. VOA's Jim Stevenson has more on the push by some athletes to raise the profile of their sports in the time between Olympic Games. Women's water polo, fencing and wrestling are, as

发表于:2019-01-13 / 阅读(50) / 评论(0) 分类 VOA标准英语2008年(八月)

By Deborah Block Washington 13 May 2008 As the price of gasoline continues to rise in the U.S., more Americans are buying smaller, more fuel-efficient vehicles. Others are holding on to their big cars, in hopes that gas prices will eventually go down

发表于:2019-01-13 / 阅读(105) / 评论(0) 分类 VOA标准英语2008年(五月)

Small Electric Jolts Reset Heart Rhythm in Animals For decades, a powerful electric shock has been a standard way to treat someone whose heart has stopped. But a new study suggests normal heart rhythm can also be restored through a rapid series of sa

发表于:2019-01-13 / 阅读(87) / 评论(0) 分类 VOA标准英语2011年(七月)

STEVE INSKEEP, HOST: The House passed a rollback of banking regulations yesterday. These are some of the Dodd-Frank rules meant to prevent a repeat of some of the worst abuses of the financial crisis. The White House says President Trump is expected

发表于:2019-01-16 / 阅读(68) / 评论(0) 分类 2018年NPR美国国家公共电台5月

By comparing the detailed images, Hubble has taken another spiral galaxy. With the best images of our own taken from the ground, and by using satellites to measure the distance and density of stars in different directions, astronomers have been able

发表于:2019-01-22 / 阅读(65) / 评论(0) 分类 自然百科2011年

Script: Well, some analysts are saying that the turmoil in the U.S markets is starting to resemble the biggest financial crisis of the past century. So are traders right to hit the sale bottom out? lets ask an expert, it's Stephen Pope, a head of Eq

发表于:2019-01-26 / 阅读(49) / 评论(0) 分类 商业报道2007年

Remember seesaws? Those things were great. But there was often a problem. Suppose theres a big kid on one side and a smaller kid on the other side. The seesaw just stays in one position: big kid on the ground, smaller kid up in the air. No fun. After

发表于:2019-01-26 / 阅读(52) / 评论(0) 分类 英语听力文摘 English Digest

图片1 There are also many verbs containing the work break. At Culips we always try to break expressions down for you; To break something down means to break it into smaller parts and explain it. Other break verbs in this episode for you include bre

发表于:2019-01-28 / 阅读(55) / 评论(0) 分类 英语博客-北美风情

Vesta 灶神星 You can see the planet Jupiter on a clear night, but Jupiter is humongous. Mars and Mercury are smaller than that, and you can see them, too. Wait a minute, our moon is even smaller, and you can see that. Could anything smaller than t

发表于:2019-02-24 / 阅读(68) / 评论(0) 分类 英语听力文摘 English Digest

Remember seesaws? Those things were great. But there was often a problem. Suppose theres a big kid on one side and a smaller kid on the other side. The seesaw just stays in one position: big kid on the ground, smaller kid up in the air. No fun. After

发表于:2019-02-24 / 阅读(84) / 评论(0) 分类 英语听力文摘 English Digest

Small People 佛罗勒斯人(Homo floresiensis)是近年发现的一种史前人类,为人属的一种,主要特征是体型小,大脑小,因此也被化名作哈比人。 一般认为他们与现代人类曾经生活在一个时代。他们

发表于:2019-03-09 / 阅读(106) / 评论(0) 分类 英语听力文摘 English Digest