Pcd
abbr. 节圆直径（Pitch Circle Diameter）；巴拿马运河局（Panama Canal Department）
🗣️ 情景例句
Oh, you're welcome.
噢！请别客气。
From the father comes honour; from the mother, comfort.
荣誉由父次，安慰由母与。
Yes, our market analysis tells us our prime user will be between 40 and 60.
好的，我们的市场分析告诉我们，我们产品主要的使用者年龄将在40至60岁。