There you can actually do sort of substance analysis which you can't really do by conventional x-ray."
VOA: standard.2010.05.05
He says it is increasingly important to do this analysis in connection with urbanization because more than half of the world population lives in urban areas.
VOA: standard.2009.03.23
But he added that careful analysis is required, and that actions taken by Iran's government do not lend credence to its claims of a free and fair vote.
VOA: standard.2009.06.14
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