Radio identification tag

A far simpler kind of chip called a radio-frequency identification (RFID) tag, which sends a tiny quantity of data over a short range when activated, can already be manufactured for 4 cents apiece.

有一种更简单的芯片叫做无线射频识别(RFID)标签，它在被激活之后可以在小范围内发送很短的一段数据，现在，其造价只要4美分一片。

If a special tag-reader is waved near the arm, a radio signal prompts the chip to transmit an identification number which is used to call up information about the wearer in a computer database.

当专用标记阅读器在手臂附近晃动，无线电信号就会激活微芯片传送识别码，从而调出电脑数据库中该客户信息。

That used to be a simple device, working like a radio-frequency identification tag when it passes under a gantry on a toll road, but it is also getting smarter.

以往这个车载单元只是一个简单的装置，当车辆通过收费公路入口处时，这个装置就起到了一个无线电频率身份识别标签的作用，但这个装置也开始实现智能化了。