"To many astrophysicists, the merger scenario seemed to be less likely because too few double-white-dwarf systems appeared to exist," said Gilfanov.

吉尔法诺夫说：“对于许多天体物理学家来说，并合图景似乎不太可能发生，因为双白矮星系统看起来太少了。”

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The African-American unemployment rate is 16.7%, the worst it has been for 27 years, double the white rate of 8%.

BBC: Blight of black unemployment in Obama's hometown

You know, if you have almost one out of five men in certain communities that are out of work - and that's double the rate for white men or more than double the rate - you would think that would make news.

NPR: 12 min 17 sec

The double McTwist 1260 sees White flip twice while completing three and-a-half twists.

BBC: Shaun White wins the half-pipe at Cypress Mountain