The major purpose in that time was to provide the real time and all-weanther navigation service in the whole world including the three domains of land, sea and air.
当时的主要目的是为陆、海、空三军提供实时、全天候和全球性的导航服务。
The major purpose in that time was to provide the real time and all-weanther navigation service in the whole world including the three domains of land, sea and air.
当时的主要目的是为陆、海、空三军提供实时、全天候和全球性的导航服务。
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