Concern about excessive Internet use isn't new.

对过度使用互联网后果的担忧已是老生常谈了。

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Teachers have expressed concern about the changes.

教师对这些变化表示忧虑。

《牛津词典》

Another study found that almost half of American workers expressed concern about their ability to provide for immediate family needs.

VOA: special.2009.03.24

In an effort to get more to keep the economy from collapsing at a time when at a time of great concern about the structure of the financial system.

在一种得到更多的努力中,预防经济在一种时期中崩溃，这个时期是,人们都很担忧,金融系统的结构。

耶鲁公开课 - 金融市场课程节选

I'm concern about our safety "Maybe we should go some place else."

我觉得这儿不安全，“要不然换个地方吧。”

Let's 课堂 - SpeakingMax英语口语达人

There was a lot of concern about Americans still on the ground potentially being held hostage.

WHITEHOUSE: Press Briefing

And at kitchen tables across our country, there is concern about our economic future.

NPR: Text of Bush's State of the Union Address

That report helped to lay to rest public concern about the much-trumpeted threat posed by EMFs.

FORBES: Should The FCC Re-Examine Cell Phone Radiation?