As games blend our real and virtual environments, should there be a 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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He also said that the privacy issues would also be a concern.

他还表示，隐私问题会引起人们的关注。

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Which means it should be a concern at every step in your process.

它意味着，应当在你的过程中关注每一个步骤。

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He realized that this "teach-in" method would be a useful way for the public to express concern about the environment to federal and state officials.

VOA: special.2010.04.21

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

An important idea, to be sure, breast cancer a major killer, a major concern to women.

不过可以肯定这样一个重要的理念,乳腺癌是妇女的主要健康杀手和关注焦点

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

But occasionally, when work calls for staying late, the return home can be a concern.

BBC: NEWS | UK | Magazine | Alone with the yobs

Thus, the high cost of sports related items may be a concern to many American parents.

FORBES: 1 In 5 American Parents Spending More Than $1,000 Per Child On Sports Related Expenses

What should be a concern is the model upon which the NHL is standing.

FORBES: Bizball: Lack of Economic Parity Could Kill NHL