With so much concern over the swine flu, it is hard to believe anyone would want to get it on purpose.

VOA: standard.2009.12.18

We should be approaching young people, encouraging them to engage, cross our religious boundaries and engage constructively with the same sort of sense of purpose that al-Qaeda recruits young people with a destructive divisive ideology.

我们应该靠近青年人，鼓励他们参与这项事业，跨越宗教界线,鼓励他们具有建设性地参与其中,带着与基地组织招募拥有破坏性的,分裂的意识形态的青年人时有的目的感。

普林斯顿公开课 - 人性课程节选

And the purpose of this course is to show you over and over and over again that starting with those one or two laws, you can deduce everything, and I would encourage you to think the same way.

这门课的目的,就是要反复告诉你们,从其中的一两条定律出发,你可以推导出一切,我鼓励你们用同样的方法来思考

耶鲁公开课 - 基础物理课程节选

The Russian leader said the purpose of the negotiating process with Iran is to obtain clear guarantees about the transparency of its nuclear program.

VOA: standard.2009.11.16

With a solar powered sail and using the sun and wind to power the batteries, the purpose of the mission is to show that renewable energy works.

VOA: standard.2009.12.10