Rfid
abbr. 无线射频识别（radio frequency identification devices）
🗣️ 情景例句
Did you find the sandwich I made for you?
你找到我为你做的三明治了吗？
Where are you headed?
你要到哪里去？
It comes nearer to the engines with which man has 'conquered' the air, as he boasts.
它更近乎于人类自夸的“征服”了空气的发动机。