Pdm
[电] Pulse-Duration-Modulation的简写
🗣️ 情景例句
OK. The beginning of my famous Thanksgiving apple pie.
好。开始做我拿手的感恩节苹果派。
How did it come to this?
岂有此理！
but custom, we have a way of thinking, is behaviour at its most commonplace.
至于风俗呢，只是些司空见惯的行为而已。