Work with a partner, colleague, or friend to be your attention sentry during times when you need to go off the grid for half a day.

与一个拍档，同事或朋友来当你的“哨兵”，在那些你需要走开半天的时候。

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If you wish to succeed, you should use persistence as your good friend, experience as your reference, prudence as your brother and hope as your sentry. — Thomas Edison, American inventor.

如果你希望成功，以恒心为良友，以经验为参谋，以小心为兄弟，以希望为哨兵。

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"What is that?" asked one sentry.

“那是什么？”一个哨兵问。

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The U.S.military uses dogs to help troops on sentry duty and bomb-sniffing patrols.

VOA: standard.2010.05.18

Two of the best are " Ice Lights", a light-installation at Vancouver City Hall that looks like ice framing the historic building, and " The Birds", a pair of larger-than-life bird sculptures that once stood sentry at the site of the Olympic Village and now roost at the Southeast False Creek Plaza.

BBC: Vancouver after the Games

To get their fix, Xbox 360 gamers with room for one more carry-on will want to turn to GAEMS. The company is showing off its G155 Sentry "personal gaming and entertainment environment" at E3 this year -- a so-called PGE.

ENGADGET: GAEMS G155 Sentry suitcase for Xbox 360 hands-on Hands-on

Beyond the camp, at each point of the compass, Nepalese Gurkhas hired by DynCorp maintained sentry positions in foxholes and in sandbagged machine-gun nests on the roofs of trucks.

NEWYORKER: The Taliban��s Opium War