这套装置以一系列精巧的金属片来聚焦和操控入射的无限电波，使标签将清晰的信号反射回来。

An intricate set of metal layers focuses and manipulates incoming radio waves, allowing the tag to send back a clear signal.

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微波由于比一般无限电波的频率高，因此，通常用于发送成千上万的电话信号和长距离电视节目。

Microwaves, which have a higher frequency than ordinary radio waves, are used routinely in sending thousands of telephone calls and television programs across long distances.

youdao

微波由于比一般无限电波的频率高，因此，通常用于发送成千上万的电话信号和长距离电视节目。

Microwaves, which have a higher frequency than ordinary radio waves, are used routinely in sending thousands of telephone calls and television programs across long distances.

youdao