The international community is worried that Tehran is planning to install a new generation of sophisticated centrifuges to enrich uranium at a much faster pace.

VOA: standard.2009.10.24

and they do a lot of things like community service and planning events, things like that.

而且他们会做很多事情，比如说，社区服务，活动规划等等。

和戏剧专业的朋友 - SpeakingMax英语口语达人