单词：Bragg cell spectrometer
单词：Bragg cell spectrometer 相关文章
By Caty Weaver Broadcast: July 25, 2003 This is Bill White with the VOA Special English Environment Report. Researchers say they have found a way to reduce the cost of some 1)fuel cell production. The
VOA2003（下）-环境与健康
US Presidential Candidates Woo Iowa Voters Ahead of Key Vote Just a week before the Iowa caucuses, which mark the beginning of the U.S. presidential election process, both Republican and Democratic candidates are rallying for voter support in the sta
VOA标准英语2016年(一月)
But he would not admit failure. 但是李将军不会认输。 Led by Pickett of Virginia, thirteen thousand men charged across the valley between the two armies directly at the Union center. 在弗吉尼亚人皮科特的带领下，1.3万士兵越过
美国学生历史
But Bragg was now greatly strengthened by soldiers from the Mississippi and by Longstreet's division from Lee's army in Virginia. 但是，此时的布拉格得到来自密西西比士兵的补充，也得到朗斯特里特从弗吉尼亚李将军那里
美国学生历史
SCOTT SIMON, HOST: Millions of Americans recharge their phones and screens and laptops before they go to bed at night, but do they recharge themselves? Arianna Huffington says we're in the midst of a sleep deprivation crisis that creates anxiety as w
英语语言学习
For something that could revolutionize the world, its come along very slowly. The fuel cell was invented in 1839, but there was little development until the 1950s when NASA started to use them in space where they are still used today. Now, after yea
国家地理2008年
中文 英文 缩写 不利状态 adverse slate 不连续发送 Discontinuous Transmission DTX 不良磁道 bad track 不良分页 bad page break 不良信息 flame 不良信息饵 flame bait 不良信息
电信英语
1. Coastal fog has brought hope of relief to firefighters battling Northern California's wildfires. More than 1,400 fires are still burning in that state. The fires were mostly started by lightning storms but quickly spread because of dry conditions
美联社新闻一分钟2008年(七)月
Good evening, everyone. We are coming to you from Oak Creek, Wisconsin, again tonight. There are significant new developments to tell you about in the wake of Sunday's shooting at the Sikh Temple. There is also here in Oak Creek a quiet, ongoing effo
CNN2012年(八)月
By Cindy Saine Washington, DC 05 July 2006 watch report Bush Troops President Bush spent part of his Independence Day holiday delivering a speech to U.S. troops at Fort Bragg, North Carolina. He thanked them for their courage, and said terrorists ar
2006年VOA标准英语（七月）
By Carol Pearson Washington 25 September 2007 A lot of people wonder about the impact cell phones might have on their health. And now a new study shows that heavy mobile, or cell, phone use may result in hearing loss. VOA's Carol Pearson reports. As
2007年VOA标准英语（九月）
By Bill Rodgers Washington 19 May 2008 Cell phones are an example of what is sometimes now called leapfrog technology, a product that allows developing nations the benefits of a reliable and extensive communications network without the heavy investme
VOA标准英语2008年（五月）
The next morning Grant attacked in his turn and slowly but surely pushed the Confederates off the field. 第二天早晨他反攻南方军，当然，他击退了南方军。 Halleck then united Grant's, Buell's, and Pope's armies and captured Corint
美国学生历史
Books and Arts; Book Review; Culture on television; The cruellest cut; 文艺；书评；电视上的艺术；最粗鲁的裁汰； The South Bank Show: Final Cut. By Melvyn Bragg. 《南岸秀：最终裁汰》Melvyn Bragg著。 The South Bank Show
经济学人文艺系列
By Victoria Cavaliere New York 16 October 2007 An annual stem cell research conference in New York has been bringing together some of the field's top scientists to discuss breakthroughs in stem cell research and what proponents call its long-term app
2007年VOA常速英语（十月）
By Paul Sisco Washington 17 April 2008 Federal regulators in Washington have approved plans to upgrade the nation's Emergency Alert System to include text messages to cellphones and other mobile devices. VOA's Paul Sisco has more in this Searching fo
VOA常速英语2008年（四月）
WASHINGTON, Aug. 4 (Xinhua) -- Researchers have found a way to turn mouse embryonic stem cells into sperm and this finding opens up new avenues for infertility research and treatment, according to astudy published Thursday in the online edition of jo
英语新闻
Turn Off Your Cell Phone 关掉你的手机 We went to the movie the other night. I sat in an aisle seat as I usually do, because it feels a little roomier. Just as the feature was about to start, a blonde from the center of the row got up and starte
趣味英语
By Jessica Berman Washington 19 December 2007 Stem cell research was the major medical and science story this past year, topping the list of achievements that experts say might finally lead to cures for many diseases. Meanwhile, global health officia
VOA常速英语2007年（十二月）
WASHINGTON, May 11 (Xinhua) -- Researchers at Brigham and Women 's Hospital (BWH), a teaching affiliate of Harvard Medical School, have identified(鉴定) a human lung stem cell that is self-renewing and capable of forming and integrating multiple bi
英语新闻