广播网

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Fixed satellite servicenetworks are mainly intended for long-distance operation of telecommunications networks,FSS satellites are employed to relay signals between large,complex,and expensive Earth stations,which are connected to the terrestrial telecommunications network.

固定的卫星系统网络主要打算供长距离的电讯广播网的运转使用，FSS卫星用来转播大的，复杂和昂贵的地面电台的信号，连接在陆地电讯网上。

Means the parent directory, so this command means to execute "toolchain.sh," which is in the current directory.

代表父目录，所以这个命令就是执行当前目录下的"toolchain.sh"。

Yes,In fact,I'm on our city ream.

是的。事实上我是我们市队的。