General Keen says U.S.troops are working to assume more responsibility for aid distribution, which will allow U.N.peacekeepers in Haiti to focus on security concerns.

VOA: standard.2010.01.18

The best of them are winnowed out to pursue further study and eventually assume positions of public leadership and responsibility.

学习能力最佳的人,会被精选出来深造,最后承继,公共领袖的职位与责任。

耶鲁公开课 - 政治哲学导论课程节选

We must assume our responsibility and give voice to them.

VOA: standard.2009.11.20