单词：valence state
valence state的用法和样例：
例句
- When it is in this condition, the atom is said to be in a valence state.当它处于这种状态时，这个原子就可说是处于价态。
- This paper has investigated the analysis of different valence states of cerium in ceric hydroxide by titration.研究了滴定法分析氢氧化铈中铈的价态。
单词：valence state 相关文章
Centre County, Pennsylvania, as its name implies, is located in the dead center of this diverse heartland state in the northeastern United States. It's home to liberal-leaning State College, as well as large numbers of older retirees and working poo
VOA标准英语2008年（十月）
Broadcast: May 12, 2003 By Jerilyn Watson VOICE ONE: American states are struggling with their worst financial problems in about sixty years. I'm Steve Ember with Phoebe Zimmermann. Today we report ab
VOA2003（上）-美国故事
Adria: So Shiloh, we're talking about politics right now and there's something in the US called red and blue states, could you explain a little bit what they are? Shiloh: Yeah Adria, a red state in the United States is a state which is dominated by R
原版英语对话1000个
Todd: OK. Hey, hello! Tim: Hey, how's it going? Todd: Doing pretty good. Could you introduce yourself please? Tim: Yeah, I'm Tim Peterson. I'm from Oregon in the United States. Todd: Oh, nice. You're from Oregon. Tim: Yeah. Todd: OK, and were you bor
英语访谈对话
IN THE NEWS - Bush Discusses Middle East Policy in State of the Union Speech By Jerilyn Watson Broadcast: Saturday, February 05, 2005 This is Steve Ember with In the News in VOA Special English. Ameri
教育与新闻
By Sarah Simpson Lagos 07 December 2007 The U.S. pharmaceutical giant, Pfizer, has confirmed in a statement that out of court talks with the Kano State government in northern Nigeria have broken down. Kano State is suing Pfizer for more than $2 billi
VOA常速英语2007年（十二月）
WASHINGTON, Jan. 6 (Xinhua) -- Two packages detonated（爆炸） on Thursday at two government buildings in the U.S. state of Maryland, but caused no serious injuries, state authorities said. One package detonated at the Jeffrey Building in Annapoli
英语新闻
By Jim Malone Washington 21 March 2008 The U.S. State Department said Friday that the passport files of all three remaining presidential candidates had been improperly breached by contract workers. The revelation prompted an apology from Secretary of
VOA标准英语2008年（三月）
The State Department confirmed Friday that Secretary of State Condoleezza Rice will go to the Middle East next week in another effort to advance Palestinian-Israeli peace talks. U.S. officials deny trying to rush the process. VOA's David Gollust rep
VOA标准英语2008年（八月）
Secretary of State Condoleezza Rice and other participants in the Middle East Quartet are due to meet in Egypt's resort town of Sharm el-Sheikh Sunday, to discuss the progress in peace talks between Israel and the Palestinians. The group will hear a
VOA标准英语2008年(十一月)
STEVE INSKEEP, HOST: More states than ever are funding preschool. That is according to a new report from the National Institute for Early Education Research or NIEER. NPR's Claudio Sanchez reports. CLAUDIO SANCHEZ, BYLINE: Forty-three states plus the
2017年NPR美国国家公共电台5月
By David Gollust State Department 30 October 2007 The State Department said Tuesday that U.S.-hired private security guards accused of killing Iraqi civilians in September may still be subject to prosecution, despite a promise of immunity given by in
2007年VOA常速英语（十月）
IN THE NEWS - State of the Union By Broadcast: Saturday, January 24, 2004 This Steve Ember with In the News in VOA Special English. Graphic Image President Bush gave his yearly State of the Union mess
教育与新闻
By Jeffrey Young Des Moines, Iowa 17 August 2007 Every August, the Midwestern U.S. state of Iowa holds a 10-day-long fair that celebrates agriculture and everything else Iowa has to offer. VOA's Jeffrey Young takes you to the Iowa State Fair. Carniva
2007年VOA标准英语（八月）
By Robert Berger Jerusalem 18 September 2007 US Secretary of State Condoleezza Rice (file photo) U.S. Secretary of State Condoleezza Rice is embarking Tuesday on a two-day visit to Israel and the Palestinian territories. As Robert Berger reports from
2007年VOA标准英语（九月）
By Peter Heinlein Addis Ababa 04 December 2007 Secretary of State Condoleezza Rice is set for talks Wednesday in the Ethiopian capital, Addis Ababa, home of the African Union, to explore peace prospects in conflict zones from Sudan and Somalia to the
VOA常速英语2007年（十二月）
By Meredith Buel Washington 05 December 2007 The U.S. Departments of State and Defense have agreed to a new system of rules designed to increase control over private security contractors working in Iraq. VOA correspondent Meredith Buel reports from W
VOA常速英语2007年（十二月）
WASHINGTON, Feb. 23 (Xinhua) -- U.S. state of Maryland's legislature on Thursday approved same sex marriage and the state's Democratic governor is expected to sign it into law. The state Senate voted 25-22 to approve the law, less than a week after t
英语新闻
Several prominent attendees the World Economic Forum on Africa are urging governments to loosen state controls to unlock the continent's growth potential. Africa remains a mixed picture for foreign investors. Former Nigerian Central Bank Governor Cha
英语新闻
The State Department Thursday observed the 10th anniversary of the al-Qaida bombings of the U.S. embassies in Nairobi and Dar es Salaam. Secretary of State Condoleezza Rice said the twin attacks, which killed 229 people, destroyed buildings but not
VOA标准英语2008年（八月）