彼此相隔一段距离的各方之间的通信。
Communication Between parties at a distance from one another.
有一段时间，没有空间通信地球。
For a while, there was no communication from space to Earth.
已经有一段时间认识到在数据通信中需要均衡。
A need for equalization in data communications has been recognized for some time.
已经有一段时间认识到在数据通信中需要均衡。
A need for equalization in data communications has been recognized for some time.
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