"The challenge is if certain types of people are doing something, it's difficult for other people to break into it," said Po-Shen Loh, the head coach of last year's winning U.S. Math Olympiad team.

去年获胜的美国数学奥林匹克代表队的总教练罗博深说：“挑战在于，如果某些类型的人正在做某事，其他人就很难成功打入其中。”

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And when I need a break, I go for a run. That's when my head is free, and I can take in the smells of nature and the architecture around me.

忙完之后我喜欢出去慢跑，跑步能令我的大脑放松，这时正是汲取周围自然和建筑所散发的香气的最好时刻。

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She was in daily fear that he would either drown Makhan someday in the river, or break his head in a fight, or run him into some danger or other.

她每天都担心法提克会害得马克汉淹在河中，或是打斗中打伤弟弟的腿，或是将弟弟置于这样或那样的危险中。

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After months of growing tension, the head of the company sent three hundred private security officers to break up the strike and protect non-union workers.

VOA: special.2010.06.10

So while the Spanish teams went back to work in early January, the Bundesliga players were just rousing from a long Christmas break to head to a restorative in-season training camp, away from the distractions of home and domestic competition.

WSJ: The Secret of Germany's Success

Check out our hands-on video after the break, and head over to Google Play to grab the free Splay launcher.

ENGADGET

Those curious enough to watch two grown men stage a living room swordfight (and provide insightful answers afterwards) can watch the battle after the break, and head to the source for more details.

ENGADGET: Project Holodeck gets a virtual hands-on ahead of launch (video)