One of the hardest things a dad has to do is watch his young son or daughter take on a difficult task and fail at it.

为人父，最难的事情之一就是看着自己的子女迎难而上，失败而终。

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Freshmen at his public high school are required to take a course in how to watch their digital footprint - in other words, to be careful what they say on the Internet.

他要求他的公立高中新生学会观察自己的数字足迹——换句话说，注意自己在互联网上的言行。

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And in Cardiff, more than 50, 000 people gathered in the streets around the civic centre to watch bands, take a turn on the fairground rides or take to the ice in the council's Winter Wonderland rink.

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While I believe he clearly grasped the moral implications of not allowing a Rwanda to take place on his watch, he also knew that the United States can no longer serve as the top cop in the world with the burden of doing everything on our own.

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Fourteen years in the making, the 4.1-million-square-foot mall, built on the site where Sy used to take his family to picnic and watch the sunset, is already the nation's largest.

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