Margaret Mead was also concerned about issues like the environment.

VOA: special.2010.01.17

Literary theory is not concerned with issues of evaluation, and it's not really concerned with concomitant issues of appreciation.

文学理论不考虑评价问题，也不关心与评价相伴的欣赏问题。

耶鲁公开课 - 文学理论导论课程节选

"One of the issues that we're really concerned about is the issue of security,".

VOA: standard.2009.06.12