Atlantis' astronauts will install a new "wide-field planetary camera" during their 11-day maintenance-and-repair mission, the fifth to the telescope.

亚特兰蒂斯号宇航员将在为其11天的维修任务中为哈勃望远镜更换一部新的“广视角行星照相机”，这是对哈勃望远镜的第五次维修。

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Therefore, to do the day-to-day maintenance of the computer is very necessary.

因此，做好计算机的日常维护是十分必要的。

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For man, maintenance of life requires about 1600 kilocalories a day (" maintenance calories ").

人要维持生命，每天需要1600千卡路里(维生卡路里)。

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For day-to-day maintenance, keep a lookout for beauty schools: they need guinea pigs, you get freebies.

BBC: Beauty treatments abroad

In the U.S., refinery crude-input volume fell 145, 000 barrels per day to 557 million barrels per day on maintenance activity at its Pascagoula, Mississippi refinery.

FORBES: Chevron's Production And Refining Down While Brazil Authorizes Ultra-Deepwater Drilling Again

We need 8 hugs a day for maintenance.

FORBES: Magic Touch: Six Things You Can Do to Connect in a Disconnected World.