这个软件可以通过蓝牙技术以及短程无线电技术作用到手机上，去检测在我们周围的20米内有没有和我们兴趣相投的朋友。

The software then uses Bluetooth, the short-range radio technology built into many mobile phones, to check whether any friends or other members with similar interests are within 20 metres.

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这能在所有的来电去电上起作用。

It works on all incoming and outgoing calls.

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