Radiospectrography
无线电频谱学
🗣️ 情景例句
Hello, Air China Flight Reservations. May I help you?
喂，你好，中国航空公司订票处，需要帮忙吗？
How much is it?
多少钱？
There's no Pippa here. This is 8686087.
这里没有皮帕这个人。这是8686087。