Ddm
abbr. 调制深度差（Difference of Depth of Modulation）；分布式数据管理（Distributed Data Management）
🗣️ 情景例句
Well, that's what fathers are for.
嗯，父亲们的用处正在于此。
All things are obedient to money.
有钱能使鬼推磨。
There was no doubt that we were unwelcome visitors.
毫无疑问，我们的来访是不受欢迎的。