Jackie Chan records a theme song for an event in Beijing. And he says he's careful about what he endorses.

成龙在北京为一件大事录制了一首主题曲。他说会对自己代言的产品倍加小心。

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In fact, that's the message we want to send out to every person and is the theme of our event.

事实上，这是我们要传递给每个人的信息，也是我们活动的主题。

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The theme of this year's event, low vision and refractive error, draws attention to the hundreds of millions of people who are functionally blind simply because they need spectacles.

今年事件的主题为低视力和屈光不正，提醒注意数亿只是因为需要眼镜而功能性失明的人。

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An oft-repeated theme at the event was that Amazon is focusing on the service, not the gadgets.

CNN: Hands-on with the new Kindles

The back story to my Black Swan event theme is the frightening headlines coming from our states, cities and counties.

FORBES: Praying For A Black Swan

In January, Olympic ceremony artistic director Danny Boyle revealed that the theme of the event on 27 July was inspired by Shakespeare's The Tempest.

BBC: London 2012: Union urges rethink over ceremonies music