肯尼迪讲话50周年正值美国太空政策的困难时期。
And yet the jubilee of the Kennedy speech comes at a difficult time for American space policy.
《空间政策指令3》为美国制定了一般性指南，以减轻空间碎片的影响以及跟踪和管理太空交通。
Space Policy Directive-3 lays out general guidelines for the United States to mitigate the effects of space debris and track and manage traffic in space.
花旗银行曾在1993由美国盛世公司接管，以首创汽车贷款政策、太空旅游政策和商业飞机航线政策而闻名世界。
This company was taken over in 1993 by Primerica and is world renowned for being the first- automobile policy, space travel policy as well as commercial airline policy.
美国更新了它的太空安全政策。
智库美国企业研究所（American EnterpriseInstitute）的一份研究提及了一名中国理论家，他认为中国应该采取太空公开威慑政策。
A study for the American Enterprise Institute, a think-tank, cites a Chinese theorist who argues that China should adopt a policy of overt deterrence in space.
但一些军事分析家和军备管制支持者声称，这项政策将为美国向攻防兼备，又有太空武器铺平道路。
But some defense analysts and arms control advocates argue that the policy will pave the way for the US to put both defensive and offensive weapons in space.
它说，它正在改变美国的太空政策来保护卫星的能力。
It said it was making a shift in US space policy to allow for protection of satellites.
一个主管官员说新的文件“不会对美国的政策进行大的改动”并且不会对放宽太空的军事用途的限制这一点进行改动。
An administration official said the new document "will not represent a major shift in us policy" and is not being written to relax the rules for the military's use of space.
一个主管官员说新的文件“不会对美国的政策进行大的改动”并且不会对放宽太空的军事用途的限制这一点进行改动。
An administration official said the new document "will not represent a major shift in us policy" and is not being written to relax the rules for the military's use of space.
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