Pdm
[电] Pulse-Duration-Modulation的简写
🗣️ 情景例句
Oh, I don't know.
噢，这个我就不知道啦。
All things are difficult before they are easy.
凡事都是先难后易。
This is not easy, and may require two porpoises working together.
这并非易事，可能需要两只海豚合伙干才行。