The curved lines represent radio waves, a symbol of the broadcast nature of the RSS feed.

图标中的曲线代表无线电波，象征着rss提要的广播本质。

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Instead of going through the power lines, some systems use radio waves to communicate, which is also how WiFi and cell phone signals operate.

除了通过电线来实现这项技术，一些系统也会采用无线电波来进行交流，也就是我们常用的WiFi和无线手机信号。

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As the plane crossed state lines neither pilot realized the jet no longer was on the correct radio frequency and that controllers were growing worried about their failure to stay in contact.

飞机随后飞越了州界，两位飞行员都没有意识到飞机已经不在准确的无线电频率上，而地面塔台也对无法与飞机保持联系感到越来越担忧。

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The meters CenterPoint is installing store billing information and upload it three times a day to nearby radio receivers that are connected to computers via broadband over power lines.

FORBES: Juicing the System

The network of amateur ham radio operators regularly spring into action during emergencies, such as hurricanes, when other lines of communication are cut.

FORBES: Magazine Article

While opening-day iPhone lines vary by location -- what passes as early enough at a Radio Shack in Nevada may not work for an Apple store in New York -- analysts generally say advance consumer demand for the iPhone 5 is outpacing previous models.

CNN: How to wait in an iPhone 5 line