Air Force pilot Gordon Cooper became an expert on the Redstone Rocket that would launch Mercury astronauts on short training flights.

VOA: special.2009.06.10

And so in this law firm, one of these guys is an expert on intellectual property and the other one on fraud or something.

律师事务所也是一样的,有人是知识产权达人,别人可能处理欺诈案件很有经验

耶鲁公开课 - 博弈论课程节选

As an expert in teaching, could you give us some advice on how best to study a language?

作为一名教育专家，关于怎样才是学习语言的最佳方式，你能给我们一些建议吗？

要继续努力 - SpeakingMax英语口语达人

while "phobos" means fear. Victor Rubio is an expert on human behavior at the Autonomous University of Madrid.

VOA: special.2009.11.17

So we're not going to turn you into an expert on computational efficiency.

我们并不是要把你训练成,一个计算效率专家。

麻省理工公开课 - 计算机科学及编程导论课程节选

Stephanie Rickard is an expert on the IMF and World Bank at the London School of Economics.

VOA: special.2011.05.20

Doctor Bernadette Daelmans is an expert on newborn and child health development for the World Health Organization.

VOA: special.2010.08.04

Professor Robert Thompson at Syracuse University in New York state is an expert on American popular culture.

VOA: special.2009.05.04

Walter Schirra, another Navy flier, was an expert on the pressure suits worn by navy divers.

VOA: special.2009.06.10

We separated and yet managed to come back together." David Blight is a historian at Yale University in Connecticut and an expert on the Civil War.

VOA: special.2011.04.09

is an expert on the problem. He says about twenty percent of the cases involve victims from Mexico -- the largest number of any foreign country.

VOA: special.2010.06.14

James Ker-Lindsay is an expert on southeast Europe at the London School of Economics.

VOA: special.2011.05.28

Tom Schwartz is the Illinois state historian and an expert on Abraham Lincoln.

VOA: special.2009.02.09

He was a professor of philosophy and an expert on black culture.

VOA: special.2009.02.22

Gerald Murray at the University of Florida is an expert on Haiti.

VOA: special.2010.04.13

He is an expert on the causes of the Great Depression.

VOA: special.2009.08.28

There he met Alan Lomax, an expert on America's traditional music.

VOA: special.2010.06.20

The Italian doctor was an expert on communicable diseases.

VOA: special.2009.01.27

Langdon is an expert on symbols.

VOA: special.2009.10.09

Ann Powers is an expert on viruses.

VOA: special.2009.04.13

But not all agree that it was genocide. Ronald Suny,an expert on Armenia with the University of Chicago, defines genocide.

VOA: standard.2010.03.18

That's Dean Cheng, an expert on Chinese political and security affairs at the U.S. Research Institute, the Heritage Foundation.

VOA: standard.2010.04.21

Tim Whittman of the Federal Bureau of Investigation is an expert on human trafficking in the U.S.

VOA: standard.2010.05.24

Scott Baldridge, an expert on this approach. Baldridge has designed a training program for elementary school math teachers who want to use it.

VOA: standard.2010.08.10

What is clear, says Claire de Gallembert, an expert on Islam at the Paris-based National Center for Scientific Research (CNRS) is that the debate is alienating France's five-million-member Muslim community.

VOA: standard.2010.01.30

(Speaking) Wilson said he was looking down on a refugee camp from a hillside: (NO TRANSCRIPTS) M.J.Gohel,an expert on South Asia and executive director of the London-based Asia Pacific Foundation, says Wilson's efforts changed the region and the world.

VOA: standard.2010.02.11

An expert on nuclear proliferation at the RAND Corporation in the United States, Brian Jenkins,says because of its proximity to Somalia and its close ties to the West, Kenya is vulnerable to the worst-case scenario, where an al-Qaida terrorist unleashes a "dirty bomb" in Nairobi causing the death of thousands.

VOA: standard.2009.05.01

said a banking expert. "Day trading" is a system that lets investors trade directly on an electronic market system.

VOA: special.2009.04.26

Randall Thompson was one of several American doctors who cooperated with an Egyptian heart expert on the study.

VOA: special.2009.12.15

Frank Miller, who also served as an arms control expert on the National Security Council describes some of those measures.

VOA: standard.2009.04.08