Compare that to AM radio waves, which are hundreds of meters long.

相比之下，AM无线电波有几百米长。

For all you hip millennial AM radio listeners, you may have noticed something.

对于所有时髦的千禧一代 AM 广播听众， 您可能已经注意到了一些事情。

The message from the emergency response community is clear - AM radio is the backbone of our emergency response system.

来自应急响应界的信息很明确 - AM 无线电是我们应急响应系统的支柱。

You can turn on your AM radio in Los Angeles at night, for example, and hear stations from Mexico, which is more than 200 miles away.

例如， 您可以在晚上在洛杉矶打开 AM 收音机，收听来自 200 多英里以外的墨西哥的电台。