Umd
abbr. 便携数字智能产品（Ultra Mobile Devices）；PSP专用光盘（Universal Media Disc）
🗣️ 情景例句
Hello, my name is Susan and I am calling to confirm my reservation.
喂，你好，我叫苏珊，我大电话确定我的预定。
I usually get up at 8 o'clock.
我通常8点起床。
In this way, he has begun his own private 'telephone' service.
就这样，他开始自己的私人“电话”业务。