美国发明:利用空气为手机充电

　　These dual factors make them a natural environment for large numbers of wireless sensors capable of detecting potential threats such as explosives or smuggled nuclear material.

　　设备的特性也能够使其为用来监测例如爆炸物和走私核武器这样大规模的传感器提供先决条件。

　　Sensors on food could scan for chemicals that indicate spoilage and send out an alert when detected, increasing food safety.

　　当传感器被运动到了食品安全方面，他们能够扫描可能变质的化学物质，并且发出警告，从而提高了食品的安全。

　　It’s not exactly the dream of wireless power envisioned by Nikola Tesla, who proposed vast tower networks transmitting electric fields, but more akin to siphoning juice from someone else’s battery.

　　不过这与Nikola Tesla所提出的无线能量的设想的梦想还是有所区别的，他提出了架构一个巨大的电力传输网络，不过事实很可能是从某人的电池中“窃取”电量。

　　When the antenna receives a signal, the electromagnetic energy is converted from AC to DC.

　　当天线接收到信号时，电磁能量将从AC转换到DC。