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Their sources of information have dried up.
他们的信息来源枯竭了。
His sources for information included the United States Census Bureau, the American Booksellers Association and the Audit Bureau of Circulations.
VOA: special.2009.03.27
The problem is, there are very few sources of information on the tracks in Rio.
BBC: Trekking in Rio de Janeiro
The problem of bad intelligence is poor analysis and not drawing on public sources of information.
CENTERFORSECURITYPOLICY: The Case Against the Halperin Nomination �� First Edition
Radio and television are also important sources of information on nutrition, health, and parenting.
UNESCO: II Part Analytic Section
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