Obama, a 47-year-old first term senator from Illinois, became a clear winner even in the early hours of the much-publicized Election Night when u.
奥巴马，47岁，来自伊利诺斯洲的首项参议员，已经在大选当晚提前几小时前很明显的赢得了选举胜利。
He says in the past 20 years we've seen 47 cases of environmental problems near U. s. bases.
郑仁哲说，过去20年在美军基地附近看到了47个环境污染的例子。
They make up 24% of the U. s. science and engineering workforce holding bachelor 's degrees and 47% of science and engineering workers who have PhDs.
美国持有学士学位的科学与工程技术方面的工作人才24%都是移民，而持有博士学位的工作人员比例高达47%。
They make up 24% of the U. s. science and engineering workforce holding bachelor 's degrees and 47% of science and engineering workers who have PhDs.
美国持有学士学位的科学与工程技术方面的工作人才24%都是移民，而持有博士学位的工作人员比例高达47%。
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