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It means that Silk and Ree's theory may be right and if it is also right that supermassive black holes helped trigger star formation, then it must mean that all giant black holes and their galaxies ar
超大质量黑洞
Why Dwarf Galaxies Lack Star Power In a study in the journal Nature, researchers show that the relative lack of star density in dwarf galaxies need not conflict with standard cosmological models if you include the blast effects of supernovae. Karen H
60秒科学
By Noel King Khartoum 20 October 2006 The Sudanese army has denied that its forces are badly demoralized after losing two key battles against rebels in Darfur. Jan Pronk Thearmystatement followed comments by a top United Nations envoy in Sudan. Unit
2006年VOA标准英语（十月）
By Deborah Tate Capitol Hill 23 October 2006 U.S. Senator Barack Obama says he may seek his Democratic Party's nomination for president in 2008, reversing his previous statements that he would not do so. The first-term senator from Illinois and the
2006年VOA标准英语（十月）
BEIJING, March 8 (Xinhuanet) -- Singer, actress, and fashion designer Jessica Simpson has confirmed she is having a baby girl when she posed nude for the cover of Elle's April issue out in news stands Wednesday. Simpson also told Elle that she and fi
英语新闻
By VOA News Johannesburg 06 November 2007 Sudan's President Omar al-Bashir and South African President Thabo Mbeki have been holding talks in Capetown to discuss the deteriorating situation in Darfur and the deployment of additional peacekeeping troo
VOA常速英语2007年（十一月）