crystal radio 矿石收音机 ; 晶体收音机 ; 晶体管收音机 ; 晶体接收机
crystal radio semiconductor set 晶体收音机
crystal radio set 使用与晶体收音机
crystal l radio 晶体管收音机
crystal mixer radio-meter 晶体混频辐射计
microwave crystal diode radio-detector 微波晶体检波二极管
In the 1910's and 1920's many people "hacked" on crystal sets to take advantage of the new high tech world of radio.
在1910年和1920年，许多人“黑”掉水晶套，从而利用无线电的新高科技世界。
He remembers with perfect clarity building a crystal radio in his bedroom around 1920 and amazing his mother, who thought music came only from Victrolas, with the music he "caught for free."
他仍然清晰记得，1920年他卧室里的晶体收音机里收听到的免费音乐，给一度认为音乐只从留声机里来的母亲带来的震惊。
And similarly old crystal radio sets and more recently modern radio frequency identification (RFID) tags, increasingly used in shipping and as antitheft devices, are powered purely by radiowaves.
同样，老式晶体管收音机，以及日益普及于航运及防盗装置上的，更新式的现代无线射频识别技术(RFID)，都是仅仅从无线电波中获取能量。
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