"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。”

youdao

They can break the brush head off and sharpen the shaft in seconds.

他们可以把牙刷头掰掉，几秒钟内把牙刷柄磨尖。

youdao

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。

youdao

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)