The icon should look like a broadcast communication tower as shown in Figure 25.

该图标看上去像一个广播通信塔，如图 25 所示。

youdao

That's why a message is so limited in length: it must not exceed the length of the message used for internal communication between tower and handset to set up a call.

这就是为什么短信长度如此受限：它不能超过用于基站和手机间内部通信的消息的长度。

youdao

But the Eiffel Tower was built before radio communication was necessary, and even before the radio was invented.

但是艾菲尔铁塔建造于无线通讯为大众所需之前，甚至早于无线电的问世。

youdao

For example, the CN Tower in Toronto,Canada is not included in the tallest building category because it is a communication tower.

VOA: special.2010.03.31