Water on the moon makes a human presence there much more feasible.

月球含水使得人类在其中的生存变得更为可行。

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There are no islands, no shipping lanes, no human presence for thousands of miles-just sea, sky and rubbish.

绵延数公里，既无海岛航线又无人烟——放眼望去，只有大海、天空以及，垃圾。

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November 2nd marked the first decade of continuous human presence in space on board the International Space Station.

月 2 日是人类在国际空间站中持续在太空中生存的首个 10 年的纪念性日子。

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"When you read a book, you are in direct contact with the mind of another human being, without the distraction of their physical presence, of their image,of their tics .

VOA: standard.2010.02.09

As you walk through the gallery, the human presence in the mountains increases dramatically.

WSJ: Photographic Balancing Acts | Swiss Alpine Museum | He Cut a Fresh Path in Mountain Photography | By Michael J. Ybarra

But establishing a human presence on the moon itself is not, actually, Mr Bush's ultimate ambition.

ECONOMIST: Spaceflight

Today I announce a new plan to explore space and extend a human presence across our solar system.

CNN: Bush: 'It is time for America to take the next steps' in space