"It is not getting weaker." Sidney Jones,a terrorism analyst with the International Crisis Group, says security experts are now learning of a growing alliance of militant groups in Southeast Asia.

VOA: standard.2010.03.24

And that group did much better on the learning task than the control group, because they were put into a positive mood.

第二组,在学习任务上比对照组表现更好，因为他们被置于积极情绪。

哈佛公开课 - 幸福课课程节选

I'm really enjoying learning about such a specific group of people with an interesting history.

俄罗斯民族的历史很有趣，我很享受学习有关这个民族的一切。

选择国际学的理由 - SpeakingMax英语口语达人