Pdm
[电] Pulse-Duration-Modulation的简写
🗣️ 情景例句
Uh-huh.
好 ，好。
What did he answer you?
他回答了你什么？
The more expensive kind of antique shop where rare objects are beautifully displayed in glass cases to keep them free from dust is usually a forbidding place.
高档一点的古玩店为了防尘，把文物漂亮地陈列在玻璃柜子里，那里往往令人望而却步。