Pdm
[电] Pulse-Duration-Modulation的简写
🗣️ 情景例句
Can I call you sometime?
我能给你打电话吗？
What time are you coming back?
你什么时间回来？
A burst of activity associated with the laying of submarine cables soon confirmed the Challenger's observation that many parts of the ocean were two to three miles deep,
海洋中很多地方可深达两三英里，