military navigation system造句
造句与例句手机版
- The us army developed this satellite network as a military navigation system in the 1970s , but opened it up to business use in the 1990s
该卫星网络是美国军队于20世纪70年代开发出来作为军事导航系统的,在90年代开放作商业用途。 - It's difficult to see military navigation system in a sentence. 用military navigation system造句挺难的
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