Ddm
abbr. 調制深度差（Difference of Depth of Modulation）；分布式數據管理（Distributed Data Management）
??? 情景例句
Where there's a will, there's a way.
有志者事竟成。
I think it's going to be too dry.
我認為天氣將會太干。
A match was held at Stilton, where both men fought for an hour.
于是兩人在斯蒂爾頓設下賽場，廝打了一個小時。