As games blend our real and virtual environments, should there be concern that some people will be less able to distinguish between the two?

游戏将真实的和虚拟的环境相混合，那么我们是否应该担心有些人会不那么容易区别这二者？

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Yet there would be concern, analysts say, if Mr. Jobs does not return full-time to the company, given his unique role in shaping Apple's products.

分析师称，如果乔布斯不能回到公司全职工作，缺少了他这样一个苹果产品设计过程中独一无二的角色，是否还能做到这一点将被疑虑。

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There is widespread concern that new houses will be built on protected land.

人们普遍对在保护区修建新的房屋感到忧虑。

《牛津词典》

Before,people with special needs were often prevented from physical activity out of concern that they would hurt themselves or be unable to compete.

VOA: special.2009.08.23

My central concern for India is that a large majority of Indians may not be benefit in front of this growth.

我最关心的问题是,面对经济的飞快发展,大多数印度人可能无法获益。

普林斯顿公开课 - 国际座谈会课程节选

Girls could be given some education, if their families were wealthy enough, but the cities didn't really concern themselves so much with girls' education.

女孩也能接受一点教育，前提是她出身富裕家庭，但总得来说女孩教育不受重视。

耶鲁公开课 - 新约课程节选

And there must also be concern at how their front row were given such a working-over against England.

BBC: Ireland v Wales

Indeed, there appears to be concern, to put it lightly, at the ECB about the scenarios used in the report.

FORBES: The Greek Haircut Could Reach 100%

However, correspondents say there will be concern in government quarters that the opposition might take strength from this protest with crucial legislative elections later this year.

BBC: Argentines hold mass rallies against government