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
I would prefer a non-smoking room.
我想要一间不许吸烟的房间。
Let me see. She has 30 minutes Tuesday afternoon.
让我查查，她周二下午有30分钟。
Many people think that Canadians all over the country speak the same way.
许多人认为加拿大全国人的说法都相同。