不需要卫星、无线电发射塔、播音室。
在网络图中添加无线电发射塔或类似的广播设备。
Adds a radio tower or similar broadcasting device to your network diagram.
比如:你也许注意到岸上的无线电发射塔和你的比赛目标在一条直线上,那么比赛中你就可以用这个发射塔作为参照。
For example, you might notice that a radio tower is in line with the buoy you're aiming for, and you can use that tower as a reference point during the race.
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