有一段时间，没有空间通信地球。

For a while, there was no communication from space to Earth.

文中提出了一种用于支持混合业务的临近空间通信网络MAC协议。

This paper proposes a novel MAC protocol for the mixed services in the near-space communication network.

波米诺夫还说俄罗斯还希望在委内瑞拉建立数个陆基空间通信设施，但是他强调，这些设施与军事无关。

Perminov also said Russia would like to station several ground based space communication facilities in Venezuela, but stressed that they would have no military application.