Discourse perspective is the embedded viewpoint of subject in narrator's reality space in narrative discourse.

语篇视角是在叙事者的话语现实中嵌入的主体(人物)视角。

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Virtual Reality space is a virtual space constructed from the real image, and can be composed of view Spaces in a kind of rule.

虚拟实景空间是以实景图象为素材构造出的虚拟空间，它由多视点空间按一定的组织策略构成。

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But seeing Earth from space may soon become a reality for wealthy people who dream of space travel.

VOA: special.2009.12.18

As mega-cities become a reality and space becomes a premium, runways could be shortened to minimise land use.

ENGADGET: blogger-avatar

Talking up the plan to The New York Times, Jain proposed putting reality TV into space.

FORBES: Naveen Jain: 'Think Of The Moon As Just Another Continent'

"The reality is that space tourism is just not cost-effective right now--it's a limited market, and it's fraught with risk, " says aerospace-industry analyst Howard Rubel of Jefferies and Co.

FORBES: The New Space Race