How to maintain integrity and validity of security information is studied through policy space and a dynamic access control algorithm based on security information is presented.

基于此，研究了如何维持在策略空间穿越中的安全信息的完整性与有效性，提出了基于安全信息的动态访问控制算法。

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This policy sets the stage for the Department of Commerce to take over the management of traffic in space.

这项政策为商务部接管太空交通管理奠定了基础。

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Officials at the White House announced a new space policy focused on managing the increasing number of satellites that companies and governments are launching into space.

白宫官员宣布了一项新的太空政策，其重点是对各大公司和政府向太空发射的越来越多的卫星进行管理。

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But one thing is sure. The discoveries in the meteorite helped shape policy and exploration efforts at the United States space agency,NASA.

VOA: special.2010.07.28

"In the event of a significant downside scenario, the economy has sufficient policy space to respond, especially on the fiscal side, " the IMF said in a report on the Asian economy.

BBC: IMF cuts South Korea growth forecast amid euro concerns

For those who have some policy space about letting automatic stabilizers do their work, about using discretionary measures, you will see good language in there, again, about how those surplus economies really need to take concrete actions to shift to more domestic demand-led growth, including by using exchange rates, but also by using domestic measures.

WHITEHOUSE: Press Briefing

The Clinton Administration, it seems to me -- despite a space policy that talks about space control -- is promulgating a policy that says we won't do it.

CENTERFORSECURITYPOLICY: Center For Security Policy