Asking a favor of the President of the United States was no casual matter, especially for a seventeen-year-old girl.

请求美国总统的帮助不是一件随便的事，尤其是对一个17岁的女孩来说。

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There are three states of matter, three dimensions. Triangulation is how we get our bearings.

物质有三态，空间有三维，而三角测量是我们寻找自己坐标的方式。

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It's all the same stuff, but those are different states of matter.

它们仍是同样的东西，但是是物质的不同形态。

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South Korea and the United States have announced they will conduct a joint anti-submarine exercise, widely expected to take place within a matter of weeks.

VOA: standard.2010.05.27

Should the Bush Administration prove determined nonetheless to press forward with such initiatives, despite the fact that they would have the effect of still further aligning the United States with Gorbachev and his central authorities -- and, as a practical matter, undermining the democratic alternatives -- Congress should move to block these steps .

CENTERFORSECURITYPOLICY: Center For Security Policy

In the United States, the question of same-sex marriage went before the Supreme Court last week, and justices are now deliberating over the matter.

CNN: Uruguay's senate approves same-sex marriage bill

But no, as a matter of fact, I mean, the notion of being First Lady of the United States -- there had never been anybody of my race who had been here.

WHITEHOUSE: First Lady Michelle Obama Q&A with Children