He says his group has been working with intelligence agencies in the 31 nations that are sending teams to South Africa to counter terrorist threats.

VOA: standard.2010.06.02

So he has been working on trying to find other tools of monetary policy.

所以，他一直在寻求找到,货币政策的其他工具。

耶鲁公开课 - 金融市场课程节选

With Jacob, who is now Israel, God seems perhaps to finally have found The working relationship with humans that he has been seeking since their creation.

在成为以色列人的雅各布身上，上帝似乎终于找到,与人类的劳作关系,他自创世起一直在寻求这种关系。

耶鲁公开课 - 旧约导论课程节选

The mad scientist has kidnapped you and he says: I've been working on mind transfer machines.

一个疯狂科学家绑架了你，他说：,我一直在研究意识转移机器。

耶鲁公开课 - 死亡课程节选