He said that was of "great concern" because the United States considers Hamas a terrorist organization.

VOA: special.2010.06.05

Their concern was not the conditions of blacks but what slavery did to whites; and usually they ended up in the same situation as Colcott Jones.

他们从不为黑人着想,而只关心奴隶对白人的影响,他们最终的下场都与考克特.琼斯一样

耶鲁公开课 - 美国内战与重建课程节选

This was of great concern because the number of polio cases shouldn't go up as the vaccine is being even more actively distributed through the country, so what happened?

这个现象让人担心,因为小儿麻痹症的发生数量,不应该在疫苗全国范围内普及后,反而有所上升,那么到底发生了什么

耶鲁公开课 - 生物医学工程探索课程节选

And is there anything that he said while he was abroad that was of concern to the President?

WHITEHOUSE: Press Briefing

But Mr Hifni said that the dam itself was of concern.

BBC: Ethiopia diverts Blue Nile for controversial dam build

But the expected bill was of concern for the NI Policing Board and could only be sorted by the Northern Ireland Office and Westminster, he added.

BBC: The PSNI says cases are dealt with on merit