Radiospectrography
无线电频谱学
🗣️ 情景例句
Or helped you?
还是帮助你？
How much is the rent?
租金要多少钱？
Sparks were emitted from small black boxes and red lamps flashed on and off angrily.
小黑盒子里迸出火花，红色灯泡发怒似地忽明忽暗。