Ddi
abbr. 深度偏差指示器（Depth Deviation Indicator）
🗣️ 情景例句
Financial security, that's what it's all about.
家庭财政状况无忧，这就够了。
Hope is a good breakfast, but a bad supper.
希望是美味的早点，但又是难咽的晚餐。
You must always return your library book on time!
你必须按时归还图书馆的书！