打开无线模式使用Kindle时，我隔几天充一次电，如果关掉无线功能，电池续航时间会更长。
The battery lasted me a couple of days between charges with the wireless on, longer if I switched it off.
早期的无线技术假定传感器以星型模式将数据发送到一个特定的接收机上。
Earlier wireless technologies assumed that sensors would send data to a specific receiver, in a hub-and-spoke fashion.
这就是无线电的商业模式，但是要真正预测到则绝非易事。
There were business-models for radio, but predicting them a prioriwasn’t easy.
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