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
Art is for enjoying, it shouldn't be wasted.
艺术是用业观赏的，不能糟踢它。
I'd like to have a seat by the window.
我要一个靠窗的座位。
Sandy was so sick that she threw up all over the bathroom floor.
三滴病了，吐了洗手间一地。