Dfd
abbr. 数据流程图（Data Flow Diagram）；数据功能图（Data Functional Diagram）；数字飞行显示器（Digital Flight Display）；数字频率显示（Digital Frequency Display）
🗣️ 情景例句
I'm so sad to see this little dog without her family.
看到这只狗没有家 我真难过。
One foot is better than two crutches.
一只脚胜过两根拐杖。
He was astonished at what he found.
看到的情景使吃惊，