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
If you don't go to college, you'll never get a good job.
你要是不上大学，就永远找不到好工作。
Are you in touch with him now?
你现在和他有联系吗？
Stop making such a noise.
别吵了。