这相当于一个光声版本的无线电频率条形码，可以用在需通过自动收费站的车上，或者给商品打价签。

This could be used like an optoacoustic version of the radio-frequency bar codes that are used by cars passing through the pay booths of automated toll roads or to tag some goods in shops.

youdao

这相当于一个光声版本的无线电频率条形码，可以用在需通过自动收费站的车上，或者给商品打价签。

This could be used like an optoacoustic version of the radio-frequency bar codes that are used by cars passing through the pay booths of automated toll roads or to tag some goods in shops.

youdao