Age estimates ranging from four billion years for Mars's southern highlands to a few hundred million years in the youngest volcanic areas were obtained in this way.
通过这种方法，科学家们获得了火星南部高地40亿年到最年轻的火山地区（几亿年）的年龄估计数。
"The military commissions have been reformed by the Congress and the Obama administration in a way that prohibits absolutely the use of any evidence obtained through torture or cruelty."
VOA: special.2010.11.20
"The city of Chicago, having obtained the least amount of votes, will not participate in the next round,"
VOA: standard.2009.10.02
Venezuelan President Chavez said in Moscow Sunday he had obtained a $2.2-billion line of credit from Russia for 90 T-72 tanks and an advanced long-range air defense system.
VOA: standard.2009.09.15
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